User blog comment:Apocaylpse06/Ichigo Kurosaki's (New) Zanpakuto/@comment-1535822-20130620071347

it is zangetsu (both the "old man zangetsu" and Ōetsu Nimaiya say so) but like other dual blade zampakuto have 2 spirit like soyo no kotowari or Katen Kyōkotsu. both have 2 blade and 2 spirit somehow related. Katen Kyōkotsu explain better both part are Katen Kyōkotsu but the 2 have differents personality.