Pretty simple, if EAW was a Shonen anime what would the person above you be. What are their powers, weapon, and role in the anime.

Are they an antagonist? One of the protagonists? In between? Are they comic relief? Do they use a sword or a bow? Do they use spirit magic or just punch the shit out of people?

That kind of stuff. Go nuts.

Member of a evil organization like Akatsuki. Your power would be to use the skills of people you have killed but only for time being

Actions speaks louder than words type of Character, people like to take you for granted but you are the strongest of the group you associate yourself with.

A Character who's Ideology for growing stronger is Hard work and nothing less. I see you to be like Goku where you don't want to kill anyone with your powers

You would be someone with a split personality, and the magical ability to change faces (One with your normal face, one with the mask)

When you have the normal face I see you operating more on agility and ki energy, sort of like Videl mixed with Pan, and personality wise you'd be a lot more sweet and playful.

With the mask, you become mostly silent, very aggressive, and have the power of magic invisible tentacle/arms emanating from your back similar to Lucy from Elfen Lied. I can just see masked Kana "floating" menacingly in mid air being held up by her invisible monstrous tentacle/arms. You would use them to completely crush, dismember and outright maim your foes. 

Perhaps your character's journey would be trying to control these two halves. :yeshrug:

I could see you as the Idiot Hero like Luffy or Goku or like the old pervert master aka Roshi or Jiraya.

Think Spike from Cowboy Bebop. Brash, Cocky but proves his skills when it comes to bounty hunting

Kenshiro from Hokuto No Ken.

After seeing your last promo (a good one btw), I would say Hisoka from Hunter x Hunter

EDIT: my sincerely apologize for a little missunderstanding. Hmm...my answer is still remain the same, but you'll be little more headed and can be cooperative with your co-workers (note: Sanatorium) so yeah, you are Hisoka type, just little more "mature". At least for now.

A yankee, a bully who loves to bully the main character but actually ended up getting rekt by that main character.

I see a sort of Fire magic and agility style, with a sort of recurring antagonistic character vibe. Probably with duel pistols because duel pistols because of your sig.

With you probably a character similar to Faust from Shaman King. Not wholly an antagonist but a threatening character with a scalpel for a sword. Probably has Oz with him as well...I can see Oz as a familiar of sorts. Tagging along behind him.

Some cult leader who can arise dead bodies as his army.

Probs a protag that joins the dark side, kinda like Sasuke in Naruto. With Untapped potential you become your former comrades most powerful enemy

Sasuke from Naruto.

you're one of the eerie characters who holds many secrets.?Also potentially an early villain to open the series.

You are the typical main character of a shonen ala Gon, Luffy, Goku, Naruto, Edward Elric, etc

Judeau from Berserk, member of the supporting cast but a trusted, loyal and exceptionally polite member of the Band of the Hawk.

Edit: Brain completely lapsed on the "shonen" thing. Maybe like Usopp from One Piece.

you remind me so much of vegeta, even tho some people said you're more like frieza

A main character who usually got underestimated by others. Brash, looks weak from the outside but have a hidden great power within and ready to unleash it when your friends and your love one got in trouble

I could see you being Neferpitou type from Hunter X Hunter 2011. Mind you, she's my favorite female shonen character of all time, lol.

Pitou is a funny, yet a cruel antagonist type. I think you'll be really fitting to be on that type of role.

Personality and role wise I can sort of see you as Len from Shaman King. Antagonistic at first but comes around later. 

I think your powers would be very earthy, rocks and walls and such. But your weapon would be more modern, like a rocket launcher that you also use for melee combat.

I feel like you can be a mad scientist who use some created chemicals to make bombs or a biological weapon. Wears glasses but when the glasses is off, that means big trouble.

Also Oz is your guardian, he might be a little kid but actually a biogenetical mutant who can transform himself into a giant monster while you're in danger.

I could see you as a character who is a silent badass on the outside, but an emotional wreck with a troubled past on the inside, and whenever people try to help you. you push away.

THIS NIGGA WOULD BE THE CLOWN CHARACTER WHO CHASES AFTER THE MAIN GIRL WHO FINDS HIM ANNOYING. EVENTUALLY HE TRIES TO GET HIS SHIT TOGETHER AND BECOME MORE SERIOUS BUT ENDS UP DYING.