Not sure how I feel about full biographies for secondary characters. A name and a couple of sentences concerning powers and some factoids should be sufficient for secondary characters that are not likely to venture forth on missions.

I'm also pretty sure I'm not fond of the third person omniscient format for non-protagonists. I think I would prefer the third person limited format with the subject being our protagonists. To use the third person omniscient is implying a certain amount of importance on secondary characters and draws attention away from the protagonists.