In general (which I often play):

Name: Gabriell (Not Birth Name)
Nick Names: Gabe, Gabby
Age: 17
Grade: Never Been To School
Powers: Doppelganger (Shape-Shifter)
Description: In his normal form, Gabriell's body is completely engulfed with grayness and disturbing ugliness. With marks surrounding his flesh, it would make his own mother turn away crying ! In a human form, it depends on what he wants to become.
Personality: Since he only been in contact with humans for months, his is still shy about their kind. When he is pissed off, you wouldn't want to be around him (but, hopeful, that won't happen).
Brief History: Gabriell is a doppelganger. Basically, they stalk, kill then live your life in your place. When he was 16 he was kicked out of his home by his mother. Traveling along, he met a high school football player, Chris Parker, and took his form and then fell in love with Chris' girlfriend, Amber! She found out he wasn't the real Chris and then they fell in love more. She gave him the name, Gabriell, because he didn't have one. When the human form went away, he left. Now he is still on the run...!