Shinobu is your girlfriend since you joined the Hashira corps, between you two is okay, she told you about her true emotions toward the demons and herself, that her older sister, Kanae is died and she took her personality abd that you made her smile genuiely every time you are with her, but she never knew about your personality, as you as well masked your true emotions with a facade just like her, and never knew your past

One day while she is a mission, leaving the Butterfly Mansion with you alone and the Butterfly girls you went in your room, to self-torment about the death of your parents, brothers and sisters for demons, calling you useless and hopeless for doing nothing to protect them, Aoi hear you hitting the wall and your screams, but she didn't infere

As Shinobu came back Aoi told her about you, and she bursted in your room, looking at you with a worried face

"Ban, what's is happening? Aoi just told me while I was gone you screamed and hitted the wall.."