Hm...I need a couple of ideas here. I'm in the process of creating two new student characters (both female) and I can't really think a of a good power to give them without them being gamebreakingly OP. 

[u]So, based on their appearances...What kind of power do you think they could posses?[/u]

Claire- Strong character, kind, smart, modest...but too harsh on herself and distant at times. Failure really affects her. 
[url=http://animerenderss.deviantart.com/art/Anime-Girl-Render-9-385500354][img]http://fc05.deviantart.net/fs70/f/2013/195/0/5/anime_girl_render_9_by_animerenderss-d6dilz6.png[/img][/url]

Desiree- Uses physical beauty to get her way, selfish character. Maybe seduction, without it being too powerful? (Might be a good contrast against Azalea who uses mental persuasion to get her way.)
[url=http://orihimeyuuka.deviantart.com/art/Danganronpa-Junko-Enoshima-render-png-442882504][img]http://img4.wikia.nocookie.net/__cb20140716062724/camphalfbloodroleplay/images/thumb/3/31/Danganronpa_junko_enoshima_render_png_by_orihimeyuuka-d7boibs.png/500px-Danganronpa_junko_enoshima_render_png_by_orihimeyuuka-d7boibs.png[/img][/url]