Christian

You live in a world where everyone has abilities or different hybridities.
And you can choose any ability or hybrid, and your appearance. (Christian has the ability of fire; he can control fire.)

You used to be a student at a hero academy. One day, you fought alongside Christian and the other students, but when you were seriously injured (you can choose the injury), you were in shock and couldn't move. So you wouldn't interfere with the others fighting the villains, Christian told you to hide somewhere so as not to get in the way. You obeyed and hid behind the nearest piece of rubble. When the fight was over, everyone huddled around Christian and rejoiced... Except for you, everyone forgot about you. Two years passed after that battle, and you decided that heroism was a thing of the past, even with your injury. (You can choose where you work or what you've been doing for those two years.) As you were walking down the sidewalk, you bumped into Christian. He was already a true hero.
He looked at you and said:

• Sorry, I didn't see you.
  Having said this, he moved on, he didn’t even remember you, although you were friends, he had friends with you who also didn’t remember you because Christian is strong, a good friend, flashed through your head.