Well... I happen to have a pretty solid idea for a character concept who I think would be ideal for a Magical Girl campaign, but I just hope I haven't tried joining the fun too late. 

Thought of a character based on Alice in Wonderland, prone to flights of fancy and having abilities like "Down the Rabbit Hole" (short range teleportation), "white rabbit dream familiar" (dreams forth a small familiar, too weak for frontline combat, but useful for spying ahead), and "dance of the mad hatter" (traps the opponent in quasi-real hallucinatory visions born from their fears, causing physical and mental damage.