Late, but I'll toss Yoruichi in here for fighting the dragons! She can contribute much of the typical shounen nonsense like flight and energy blasts. She's insanely fast, enough to leave afterimages, and can punch a city block to rubble with her bare hands. She can also heal!

Depending on which shinki she has to fight with, she'll either have a Hollow mask and sword, a pair of leather gauntlets and boots that let her break barriers, or a headband to enhance her healing powers.