I suggest a character who had to live in the shadow of her other sibilings, which caused her to gain a inferiority complex but later her companion and friends try to chip it away.

Now I’d need some context to the story before I go spouting off proper characters. Do you have a decided upon theme? That would help

Personally, it all really depends. For me I like and make characters who put up acts while speaking. Not anything like fitting in (although that could be a theme) rather seeing the character interact with certain situations in different ways, despite them being all from the same character. But that's just me, and if I find any better idea's I'll try to share it out with you.

Now I’d need some context to the story before I go spouting off proper characters. Do you have a decided upon theme? That would help For a general idea, the main character has been through physical and psychological abuse. She is albino as all, so with the school's way of rumours she does feel as if she cant walk around. Her ideal is to change the world itself to think kindly, though she knows she cant do that.

Personally, it all really depends. For me I like and make characters who put up acts while speaking. Not anything like fitting in (although that could be a theme) rather seeing the character interact with certain situations in different ways, despite them being all from the same character. But that's just me, and if I find any better idea's I'll try to share it out with you. Does this mean that the protag will break out of character when it's too much for her? As if she's trying to be a certain way but is really bad at it?

To a certain degree I believe so. Think of it like a act, creating a alter ego of sorts. Like an actor in a movie they play their part and nothing more, but in reality you know they're not like their counter part. This can come full circle with going back on the two sides, some how creating another for better or worse.

If I make her act in the complete opposite way in the cognitive world than she does in the normal world, would that count? It would name it harder for her comrades to recognize her.

It depends, you must know that each character needs different situations to show their feelings. I'm now developing a character right now and I have to say is hard for me becase her history is very complex, I must carefully choose her actions and words because the wrong one could give the wrong idea. I recommend you to be calm and if you don't know if something gives you the correct idea ask someone. Good luck with your character.

I recommend you don't ask people on the internet for their character ideas. It's your story, you're supposed to tell it with your own characters.