Hyakunensensō (百年戦争, Hundred Year War), shortened to simply Hyakka (百花繚乱, Hyakka) is the manifesting spirit of Susumu Rokuro's zanpakutō. Having been passed down generation to generation from parent to first born child, making Hyakka's live longer and with more than a single wielder, slowly driving her mad due to her own feelings not being acknowledged whenever passed to her new partner.