User blog comment:Kurare/Yoruichi Shihōin's Zanpakutō theory/@comment-4207271-20140820130019

I like the train of thought, but I do think it is simply a unique ability, similar to the Human Transformation of Komamura's Family. Just from looking at possible foreshadowing and the lack of any Zanpakuto with similar abilities to personal transformation, I would say a likely typing would be a Lightning type. This is from her quick, sparky personality and looking at her imperfect Shunko having electricity-like effects.