Yahiko is Yahiko.Because typing Subaru Ryusei is less fun than typing SuRyu. And I like making nicknames like that.
Yahiko could be called KaiYah if I wanted to.
Futamaru could be FuMar
megumi's name is too short to make one work.
My name isn't compatible (and I'd probably throw a fit anyways....)
Futamaru is Futa.
megumi is gumi.
bladesworn is blade.
OKAY?!