Zangetsu

Ichigo's Zanpakuto spirit who is part Hollow, he only exists in Ichigo's inner world which is filled with Sky Scrapers, side ways filled with water. His not the only spirit in Ichigo's inner world but his more insane because of his Hollow side. He runs on pure instinct and blood lust for battle but does Care for Ichigo. He calls Ichigo King often. (Your Ichigo btw)