Aya Natsume is an accomplished close combat fighter and her staff techniques are unrivaled. Her special abilities allow her to glimpse the past, present, and future, which can be decently handy in a fight. On the other hand, Biko’s battle suit allows her to gain a degree of super strength and speed. She is also a genius and she has built some pretty powerful robots in the past. I’m going to say that she has the edge here, but it’s a fairly close battle. Biko Daitokuji wins.