User blog comment:Godisme/Awesomeness/@comment-1706259-20100513184856

Well Mashiro threw away her Zanpakuto and she was a hand to hand combatant as well; who would most likely have the armor from her hollow from (TPTP arc) as her Shikai. I think if Kubo ever had the idea as armor as Shikai; it would have been given to her. But I don't fully rule out Yoruichi's armor as her Shikai.