RWBY Eunnie (Patreon)

Armed with hybrid katar daggers/pistols and the semblance of vibration, he makes a decent living for himself in the world of Remnant as a thief. 

He's spent a lot of time mastering his semblance, being able to vibrate himself in order to become momentarily intangible to phase through objects and attacks, as well as vibrate his weapons, increasing their cutting power.