So if I could have anyone anime character to be my partner in a zombie apocalypse, I'd have to go with Byakuya Kuchiki!!
Primarily because he's a badass and could take out huge groups of zombaddys in one swoop!
He has stupid powerful attacks, mind of a tactician and is always calm and level headed. Not to mention he has total control of his power so no untainted humans would be harmed and he wouldn't needlessly distroy everything unlike other op characters I could have chose. Byakuya just seemed like the best choice for this type of challenge. @VinMcCarthy