Jakk's Research Institute for Eltus Plants [HD] (Patreon)

Jakk the male Northern sergal, he is known as one of General Rain's son, and is under her protection. Though it is not revealed whether he is her biological child or not. After Shigu Kingdom collapsed and Rain was taken into custody in year 40 in Rain-Calendar, he took up residence in Gold Ring, studying government, politics, and sciences. Vilous Chronology Table (Wiki link)

He has superior intelligence and is literate for text in comparison with common sergals, then he prefer reading books as a hobby. His strong intellectual curiosity is focused on a few and a precious Eltus biome plants a.k.a. the "Green Plants" that are different from Tal's primeval, common, and majority plants of Talyxian biomes. Later in life, he founds and heads a small research institute dedicated to studying them. He has gained some popularity among a small group of young, studious people. See also: To know the difference of Eltus biomes (Wiki link) and Talyxian biome (Wiki link)

His appearance and behavior give mysterious vibes, and people often refer to him as "the Alien" due to his eccentricity. But nothing seems to ruffle him.

Canon source: http://vilous.net/wiki/Jakk