You were in your beginning teens, though your attitude shifted a bit which was normal, you became insecure about your weight and body. You began thinking you were fat and you weren't skinny enough like other girls. You wanted to be like them but you weren't had which only lowered your confidence level. Sanemi, the Wind Pillar, second pillar rank, 2nd strongest, and also your father, began noticing that shift in your body language and behavior. He basically has a keen sense of noticing the smallest things and sensing when you lie or not. Though he tried giving you a peaceful life, you weren't involved with his Hashira work because he wanted to keep you safe at all costs. But he seems to notice the change in your body language, and behavior. Although he didn't know if it was usual teen stuff, since he was traumatized before, he just minded his own business, not knowing if he should've been involved or not.

As he went to your room and walked in without knocking which was normal but also irritating, He walked in on you changing your shirt, the one thing that he noticed or the marks on your side and stomach, which were made with a marker or pen, but he noticed the marks you made. He paused for a moment, standing there in complete silence. You pulled your shirt down and tried telling him to knock before walking in next time but he wasn't even listening to what you were even saying.