I agree with everyone in the discord servers incubator channel that you have a pretty solid character idea. Though if you still insist on further input, I'll just ask one question for now. What do you ultimately want from him as a character for yourself?
hm, i don't think i completely get this question, so i'll answer it twice;
1) i want a character with a simple design that features elements i'd have fun drawing repeatedly, and yet can be adapted, partially concealed or changed as a scene or even panel needs it, without the character losing their recognisability.
2) i want to use this character to test everything EV has to offer, from challenges to tournaments to special events. i'd actually like my first comic to be about oleander, but adapted to fit into the ... quite specific setting the boy up there is part of. i will a thousand percent toss him at scar matches, but not death matches.
I get the impression that you made up your mind on a lot of the stuff that makes him good so I asked the question because it would help you realise more of what you already know even better. It'd be cool to see your Oleander!
Also, also the mockup of his bio is fun, eager to see your intro comic.