Board Thread:General Discussion/@comment-13237238-20130803060401/@comment-11051098-20130805153630

I rather think he used Kendo just to kill off Nnoitra quickly. He was already annoyed because Nnoitra refused to accept losing without getting killed, so he dealt the final blow with Kendo to make sure he died and stopped being annoying :P

Haha, if Kenpachi's Zanpakutô really turned out to be the healing kind, like Unohana's, he could kill strong opponents and then bring them back to life just to fight and kill them again. That would probably make up for the irritation he would feel about having a healing-type Zanpakutô :P