Mina Ashido, ProHero Acid Tank! (Patreon)

--- Hallway Heart to Heart ---

“Ah, Izuku? Is something wrong?” Mina Ashido asked. Izuku Midoriya had been staring at her intently. She had seen the look before. It was not mean or angry, but rather intensely inquisitive. It was the look he had whenever something triggered his deeper powers of analytics and observation. Some might argue that his true power, even considering his quirk, was his ability to read a hero, villain, or situation. Within the small and unassuming boy was the head of a strategic genius. Unused to this sort of deep scrutiny, Mina twisted a lock of hair as a bead of sweat traveled down her neck. The young boy said little, scratching his chin and looking her up and down. He moved positions, walking around his companion. “Izzzzuuukkkuuu, stop it you weirdo!” Mina tried to push him away, but he was relentless. Other students and teachers eyeballed the pair as they made their way through the hallways of U.A. Izuku’s study became more and more refined as he went. He mumbled to himself, thinking through his mental questions. Mina tried to dodge him, but Izuku out maneuvered her easily. Finally, standing back to back with Mina, he had his suspicions confirmed.

“Mina! Have you gotten taller?” Izuku asked, his voice and tone relenting from the serious study. He had reverted back to the friendly, unassuming, and even somewhat weak sounding boy he normally was. “I could swear. . .” He started to speak further, but was cut off by Mina clamping a hand over his mouth. The pink woman dragged her friend into a side hallway, far out of the path that anyone would normally take. Izuku, unsure if he had overstepped his bounds, simply let himself get tugged along. He was placed up against a wall and had a very bright pink finger tapping his chest. Izuku, however inadvertently, realized that he had stepped into a hornet’s nest of sorts.

“Izuku! You aren’t allowed to ask a woman about her height.” Mina said, trying to control her emotions.

“Uhhh. . .isn’t that weight?” Izuku asked, mentally leafing through all the advice that he had ever been given about women.

“Izuku!!” Mina stomped a foot. Her little stomp shook the floor around the two. Izuku’s innate powers of analysis triggered again. Perhaps because he sensed just a bit of danger from the current situation. Mina was acting strangely. Usually bubbly and nice, the pinkette was visibly upset to the point of physically towing Izuku into a side hallway to have a conversation. It had all started when he mentioned something about her getting taller. Yet, there had been something else just now, something barely perceptible that had happened when Mina had stomped her foot. Izuku couldn’t help but pick up on it, but he let it go for the moment as Mina started speaking. “Listen, Izuku. . .” Mina began, pulling him further down the hallway. She grabbed his wrist and marched forward. The hallway got darker. It was a portion of the school that was slated for repairs and remodeling after a minor quirk accident, the perfect place for a small heart to heart. Mina stopped just where the hallway reached its darkest place. They were tucked away from the faculty and student body here, but still able to see each other fully.

“Izuku. . .Izuku.” Mina began again and then again, trying to find the right words to say. “My quirk has two parts to it. Just like Todoroki I was born with dual powers.” Mina strained her arms, tightening her fists in order to steel herself. “Uuuuggghhh, this is not fun to say.” The pink woman closed her eyes and took a deep breath. “The more I eat, the more I grow. Up. . .” She put a hand above her head, pretending to mark her head on the wall. “. . .and out.” Her hands drifted down to her shirt. She lifted her shirt to reveal a pudgy, round belly. Izuku’s thoughts were confirmed. Earlier, when Mina had stomped her foot he had felt the belly bounce and press against his own small, thin body. Further, when studying her in the hallway, he had realized that they were looking at eye level rather than Izuku being a couple inches taller. The changes were only perceptible to someone as studious and diligent as Izuku. This was perhaps why Mina had felt the need to drag him aside and confess, he would have discovered the truth eventually. “If I’m not very careful with my diet, I would end up a gigantic blob.” Mina sighed, tapping her toe against the ground.

Izuku paused, weighing his intellectual curiosity against his good nature. Above all things, Izuku Midoryia had a big heart. He wanted to do what was right for everyone, regardless of who they were. It took a moment, but he finally arrived at the words he thought were best. “Wow! Mina, that’s pretty cool.” He put a hand to her shoulder. “It’s maybe a little odd, but it's still a way to make yourself a better hero.” He smiled, letting his friendly nature shine through and brighten the dark hallway. As always, he spoke out of a place of truth and love. “Just think of how much more acid you could produce and the surface area it could cover!” He ended his impromptu pep talk by putting his back against the wall next to her. He enjoyed the closeness to Mina.

Mina sighed and then laughed a little. “You do know how to cheer a girl up, Izuku.” She slid to the ground, her belly becoming more noticeable as her back rounded against the wall. “But I couldn’t, it would be too weird. People would make fun of me too.” She looked up at him, her face taking on a bittersweet cast. It was obvious that she had been holding back a part of herself for a very long time.

“Weirder than a belly-lazer cannon, throwing purple lumps, or being a frog?” Izuku said, leaning into Mina’s shoulder. “Besides, the people who would make fun of you would just be villains. We already have to stop them anyway.”

“Uggh, I hate how convincing you are.” Mina laughed, wiping some tears away from her eyes. Izuku hadn’t seen them getting wet in the darkness of the hallway. “But I can’t. . .it’d just be too strange.”

“No one is telling you what to do. Just that you should think about it. You never know what might give you an edge as a pro hero.”

“Thanks, Izuku. This means a lot to me.” Mina said, leaning back on his shoulder.

Izuku put his arm around Mina, happy to comfort her at least a little. At the time, Izuku had merely thought that he was consoling a friend. Yet, his words struck far into Mina’s soul. A certain comfort came over her that she hadn’t felt in a long time. Much of her life, people had advised her on how to avoid triggering her secondary quirk. They talked about maximum calorie intake, slimming clothes, and foods that acted as fat burners. It had helped Mina, but only to mask a part of herself. Izuku, on the other hand, spoke about usefulness and potential to use everything that she had been given. Mina could not help but wonder what a little tipping of the scales might do for her.

--- Mina’s New Perspective ---

“Hey Mina, mind if I sit down?” Izuku asked, motioning his lunch tray to the seat opposite his brightly colored friend. Izuku had gotten to lunch late and found himself without a place to sit. He had scanned the crowds of students surging through the cafeteria and had landed on Mina. She had been sitting by herself, picking at her tray of food. It was uncharacteristic of her to be eating alone. Both in need of a spot and out of concern for his friend, he had walked over. Mina had been sitting quietly, dividing her time between forking spring rolls into her mouth and looking at her phone. Izuku could not read her face, unable to tell if she was simply taking some time to herself or if she was feeling down about her body again. Izuku had seen little of Mina since their last conversation. Carried away with school, training, and other obligations, the young boy had not been able to make further conversation. Yet, their heart to heart had been on his mind. It was not easy to divulge such a secret.

“Oh! Izuku. . . sure!” Mina said, smiling. If she was feeling depressed, she didn’t show it by any means. Rather, she kicked out the seat opposite her and motioned for him to sit. Izuku took the opportunity, sitting down in record time. “I’m actually glad that you came by!” Mina said, scooping a heap of rice into her mouth. She chewed quickly, swallowing it almost as fast as she had brought it up to her mouth. “I thought about what you said to me. . .and I’m going to go for it!” she said before heaping more rice and chicken into her mouth. “I’m going to start making use of my quirk, all of it!”

“Wow! That’s amazing, Mina. Are you sure? I didn’t mean to push you into doing anything drastic.” Izuku said, looking at his friend.

“No! I want. . .mppgh. . .at leascht. . .umpgh. . . to try!” Mina took bites out of a large meat bun as she talked. Izuku could see her eyes lighting up as she bit into the meat bun, dipping it in thick and savory sauce. She ate happily, in a way that Izuku had never seen before. “Live fully as myself, if only for a little bit.” She gulped down the rest of the large, fluffy bun and smiled. Her cheeks were puffed out to the sides, filled with both fat and food. “A trial run!” She said after gulping down the meat bun.

“I’m glad to hear that, Mina. I hope it goes well for you!” Izuku said, working through his own lunch. “I was worried that you might not be taking things well, it’s so rare to see you not eating with other people.”

For a moment Mina sobered up and grew solemn. She tapped her remaining meat bun and frowned. “Well, I haven’t exactly told anyone yet. I wanted to make sure that I was comfortable first. I still talk to the girls during class, but I need some lunches to myself.”

Izuku nodded, not wanting to push the envelope too much. “I think you could tell them at any time and they would understand. But I’m glad that you are handling everything well. I don’t know if I’ve ever seen you eat so much!” He finished strong. If nothing else, he was happy to have some alone time with Mina again.

“I know! Can you keep a secret?” Mina leaned forward. Izuku met her halfway, interested in what she was going to say. “It’s my third tray today!” she laughed, rocking back in her chair. Izuku truly studied her as she laughed. It was obvious that Mina had been growing. The buttons on her shirt and jacket were tight, threatening to pop off with each belly-laugh. Her breasts were clearly visible, blooming out of the top of her button up like pink orchids. Further, Izuku could see the outline of her bra pushing into her clothing. “I thought that maybe I had suppressed my appetite so much that it couldn’t come back. . .but nope! Mina spoke while patting her stomach, the soft expanse bouncing up and down as she spoke. “And, my quirk is already starting to work!” She stood up, pushing her chair back. It was hard for Izuku to tell how tall Mina was sitting down, but she certainly had grown. Her skirt was far shorter on her legs, showing much more of her plump thighs. Between the weight gain and height change, she was going to need a new uniform sooner rather than later.

“Come over here and compare!” Mina waved Izuku over, her stomach jiggling with the exaggerated motion. Izuku did as he was asked. Even before he stood side by side with her it was obvious that she was now noticeably taller than him. Her head and eyes were above his by at least a couple inches while her breasts were level with his neck. “Stand right here!” with strength that she hadn’t possessed weeks ago, Mina guided the smaller boy to her. She turned, trying to stand back to back with him. Her butt rested on his lower back, softly showing its dominance. “Hmm, try to lean back just a bit.” She said, trying to put her shoulders against his. She was blissfully unaware of how her prodigious booty prevented close, back-to-back contact. Each time she tried to lean back, her soft butt pushed Izuku away.

“Ah, Mina, I think. . .” Izuku started to speak, unsure of how to address the obvious.

“Come on, Izuku! Stop playing with me!” Mina said, hopping up and down to work herself back. Her voluminous backside bounced up and down, rubbing against his comparatively smaller body.

“Well, it’s just that. . .you might be getting a bit wide to do this.” Izuku put a hand to the back of his head, trying to play off the awkwardness of what he had just said.

“Izzzuuuuukkkkuuu!” Mina yelled, turning around. Instead of how tall she had gotten, she fully planned on showing the smaller boy just how well her acid production was working and how much strength she had gained.

“I’m sorry, I’m sorry!” Izuku said, turning and running for dear life.

--- Can A Girl Get Too Big For Gratitude? ---

Months after Mina’s reveal, Izuku was just about to enter U.A’s gym when he felt the tremors. They hit with devastating force, but without the randomness of an earthquake or other seismic disturbance. Rather, they fell one after the other. It was like standing on a bounce house floor as someone ran forwards, someone large. Utilizing One for All, Izuku turned and moved through the quakes. Even with the absurd strength that his quirk granted he still had to move slowly. He turned just in time to meet a wall of bright pink fat. He could do little as it slammed into him, strong arms scooping him up and pressing him further into the monolithic softness. The bulk was warm and cozy, Izuku felt a sense of comfort despite being immobilized. “There you are! Trying to sneak in some training without me?” The voice boomed even through the folds of fat that were engulfing young Midoriya. While exceedingly loud, possibly even rivaling Present Mic, it was still chirpy and feminine. “Afraid I’m going to show you up again?” The voice rolled out like taiko drums. Izuku could feel the reverberations spreading through the fat that held him, shaking his chest.

“Ah, hey, Mina.” The green haired boy tried his best to pat her stomach, succeeding only in moving his fingers. The extreme physical closeness and loud voice had become hallmarks of the acid hero since starting to experiment with the other half of her quirk. “I’d. . .oof. . .never practice without you.” Izuku felt air leaving his lungs. The world was starting to grow dark, but he did little to escape; he did not mind a soft and pink tomb. Just before slipping out of consciousness he was released. Dropping several feet, he crumpled to the floor. “Tha-thanks. . .” He breathed, trying to suck his soul back into his body. His vision returned slowly and he saw the towering figure of his closest friend above him. A wall of belly fat heaped upon two titanic legs shook in front of him. Mina had surged in growth since beginning to free her quirk fully. She now topped out at over 9 feet and was nearly as wide. She was reaching the point where her head could easily hit most ceilings and her hips brushed against either wall. Custom clothing was sewn for her almost daily, her heroic and gluttonous lifestyle requiring more and more creative solutions. Today, she simply wore some tight, turquoise yoga-shorts with a matching sports bra. Her stomach and breasts easily overflowed her clothing, putting her dangerously close to being exposed. “I was just warming up.”

“Uh-huh, is that why you’re sitting on the floor?” Mina leaned down, needing to use her log-like arms to push her fat down so she could see her smaller workout partner. Mina was an interesting mix of adorable and terrifying now. People found themselves overwhelmed when meeting her for the first time, their minds split towards apprehension or infatuation. Even classmates that had known Mina for years were trying to adjust to her new body. Yet, everyone could appreciate the skill and determination she wielded for heroics. “Seems like someone who wants to be the best hero shouldn’t be lying down on the job.” She smiled, her round face growing slightly wider as her fat pressed outwards. Mina now boasted puffy cheeks and thick chin rolls. While obscuring her once angular face, they only added to her adorable nature. While towering, she was more than cuddly.

“Uh, well, just enjoying the view I guess.” Izuku smiled, not sure what else to say. It certainly was true. There was nothing he liked more than seeing Mina and her immensity. The rolling hills of pink ran through his dreams.

“Gosh, number one hero or number one flirt.” Mina blushed. Still, she extended an arm to her small friend. Izuku was quickly lifted to his feet.

“Not like that!” He tried to cover his obvious romantic interest. “I just mean you look so much happier now. Fulfilled and ready to be the best hero you can be!” Izuku meant well, but his eyes instantly betrayed him. He had the hard choice of staring at Mina’s stomach or the underside of her breasts for conversation now. While a good and decent boy, he was still prone to the same desires any other man would be.

“Well, I owe it to you.” Mina said, crouching down as best she could. Her fabric groaned as she crouched down to look into Izuku’s eyes. “I get to be the best and biggest version of myself now!” She smiled, fighting the impulse to hug him again. She was beginning to be able to gauge her strength better and knew that he probably didn’t have the strength to take another one. . .at least for a while. “You’re the best, Izuku.” She said, her eyes a little misty with something between admiration and love. She stood quickly, taking advantage of her height to hide her emotions. She bowled Izuku over again, her stomach bouncing him forward. Mina wiped at her eyes quickly, hoping that her tears didn’t make her makeup run. She might have been able to control herself, had she not felt two slim but strong arms pressing into her girth.

“You made the choice. I just provided a little perspective.” Izuku said, trying his best to hug Mina. His arms certainly couldn’t reach around her anymore, only able to get halfway around her drooping stomach. However, he hugged what he could tightly and pressed himself into her belly as best he could to make his point. Tummy fat rested on his head. Neither cared that their little moment was happening outside of the gym. Mina was too big to see much below her and Izuku was buried to the point of partial obscurity. To each other, they were the only ones that existed in the world. “I just want you to be the biggest and best you possible! For now and ever!” Izuku said, beaming.

“I will!” Mina’s voice boomed out again, filled with emotion. The challenge to be her best, taking full advantage of both sides of her quirk was imprinted on her soul. . .along with some feelings for a certain green haired hero.

--- Pro Hero: Acid Tank! ---

5 years after graduating from U.A, Izuku stretched his arms. He felt strength move through his body. It was strange to think that he was now the world's top hero, a position once occupied by the man he admired more than any in the world. Fans and media crowded him daily and his responsibilities were never ending. The only time he could truly rest was at his favorite training place, the decommissioned zone. It was an abandoned part of the city, the remnants of a truly impressive battle that had taken place years ago. Requiring the help of nearly every prohero, it had cost the city and the world dearly. Rather than rebuild, it was left to its own devices. It was an informal monument, a place where heroes could go to simply think and be themselves. Izuku loved to come to the decommissioned zone and practice. Though, he was not the only person.

“HOOOONEEEEYYY!” Izuku was stirred out of his reflection by a voice that came from the heavens themselves. While far off, it rang out like thunder across the very sky. Izuku knew well what would follow. The ground started to shake, almost unable to bear the titaness that strode across it. “WHERE ARE YOOOUUUU?” Mina’s voice rolled out across the empty cityscape. Izuku smiled, knowing that his love was going to keep calling until she found him. People for miles around would know that she was looking for him. There was some comfort in that, a simple acknowledgement of the untypical yet typical marriage the two found themselves in. The tremors grew closer. A sheet of concrete fell from an old building, freed by the heavy tread of Mina Ashido, the pro hero Acid Tank.

“Over here!” Izuku called, using his quirk to leap up to one of the abandoned skyscrapers that littered the zone. He saw his wife immediately, though that was not hard. Mina was gigantic. Years of indulging her appetite and quirk fully had allowed her to reach a personal zenith. At 100 feet tall, she was the biggest hero to ever exist. She was truly massive, a colossus given free movement. She wore a special suit, modeled after her old one though allowing her immense breasts more freedom. Her biceps were rich, luxurious clouds of fat. Mina always had a propensity to carry fat in her arms and that had not changed with age or increased mass. As she waddled forward, her biceps knocked her breasts back and forth. Izuku couldn’t help but smile as he watched her breasts bounce. The literal hills of fat heaved up and down with obvious weight, it was strange to think that they alone could probably crush a building. There was no part of Mina that could be called small.

“Aaaah! There you are!” Mina beamed, now quieting her voice to a low rumble. It echoed now over blocks rather than miles. She ran forward, excited to reach her husband. To further speed up the journey, she poured acid out from her hands. Immense geysers of acid flowed from her, easily melting down the mega-structures that stood in her way. Mina skated on her acid, elegant despite her weight. Her booty, large and dominating despite her kind nature, knocked buildings down as she came onwards towards Izuku. The decommissioned zone was one of the few places that Mina was allowed to be her carefree self. Utterly abandoned, the zone allowed her to move, speak, and act without the fear of hurting someone. She was far too large to be unreserved in the city limits. She came to a stop right in front of Izuku’s chosen spot, her belly shoving into the building. The structure tilted backwards, its supports tested by Mina’s body. For the moment it held. “Did you hear the news?” Mina asked, clutching her hands to her chest.

“I think I heard something about a new ranking for heroes. . .” Izuku smiled, tapping his forehead. “But I can’t recall exactly.”

“Psssh, don’t lie to me!” Mina stomped a foot, sending a shockwave through the zone. Several buildings collapsed off in the distance. “You know good and well I moved up in the rankings! Acid Tank is now the 20th most popular hero!” Mina’s chins bounced up and down as she happily delivered the news. Her chest puffed out in pride, almost big enough to rest on the building Izuku was standing on.

“Wow! Who knew so many people liked big women!” Izuku teased.

“Don’t you forget it, Shrimpy!” Mina stuck her tongue out. “I could find a new, tiny husband like that!” She gave a flick of her flabby arm and snap of her thick fingers. The shockwave from the snap shattered some windows and knocked Izuku off balance for a moment. Mina leaned forward. As her mountainous form slid forward, her booty jutted out further behind her, accidentally wedging a building between her massive asscheeks. When she finally straightened up, the poor building was revealed. It was mangled beyond recognition, its once mighty and well built body now bent and twisted from being encased by Mina’s ass folds.

“Well, I had better make sure to keep you happy then.” Izuku smiled, knowing when to stop the teasing. “What does my mega-wife want to do to celebrate?” He asked, already knowing the answer.

“Eat! Duh!” Mina slowly reached her hand out. She grabbed Izuku and flipped him onto her shoulder. Thanks to One for All, Izuku was no worse for wear as he landed on a broad shoulder. “There’s a new restaurant that is boasting that it could feed me. I want to show them how wrong they are!” She turned and started to slowly waddle forwards, having to turn like a piece of artillery.

“Another one? You’d think they’d learn by now.” Izuku said, resting on a particular soft back roll. “Guess Acid Tank will have to teach them a lesson in capacity.” He smiled, enjoying the slow rocking of his wife’s immense form. He wondered if a restaurant could actually feed Mina. At some point there had to be someone that could complete the challenge. No matter what, he was primed to enjoy the sight of Mina eating her fill.