User blog comment:Xilinoc/Ch. 648 - THE THEATRE SUICIDE SCENE 2/@comment-8179648-20151022115152

you know in my opinion I think Shunsui's zanpakuto fits his philosophy of "In battle both sides are evil" in an odd sort of way. His shikai is subtly evil covered up in the form of children games while his bankai is dramatically so.... kinda fits with the ninja and courtesan theme of his spirits (Muramasa arc is practically canon considering Tite Kubo design the spirits)...if i follow my theory on the zanpakuto representing one shikai and one bankai each.