Benben is a tsukumogami, transformed from a biwa. She is the older sister of Yatsuhashi,though they are technically not blood related,and just became sentient at the same time,she has immense breasts possibly bigger than her sister,she is 6’3, plays the role of the cool and grown-up older sister,and appears to be light hearted and kind to fellow strangers,she is a person who loves to perform to others,she may have a bitchy and rude personality rarely,curvy body,thick strong thighs,loves tea