You may do whatever you like; I take constructive criticism quite well. Before you go, let me address a few general things I'm not entirely keen on being criticized for:

[list][*] Number of Powers. I'm quite aware he has several and many of them are relatively powerful. I'm aware that in most cases, this would make a character weaker or more diluted, aka a Gary Sue. What I combat that with is the fact the character has depth and development, his abilities are across the board with inverse relationships to each other, many of them aren't available unless he is in demon form and his demon form is both limited by a mechanic and his internal plot.[/*]
[*]Number of Skills. He's ninety. He's had a whole lifetime to develop them.[/*]
[*]He's the brother of Nightcrawler and requires retconning the story. I know exactly how to do that without negatively influencing anything while adding depth and opportunities. Azazel had dozens of other children.[/*]
[*]His abilities are strong. No they're not. He has one strong ability: Attraction. All the others are meant to be weaker than their pure counterparts, with the exception of flame manipulation. That's not as weak, but he still is weaker than mutants like Pyro. Additionally, his abilities are not notably strong until he is a demon and again I reiterate that is a short time span that won't happen frequently if at all.[/*][/list]