Dazai's been a bit distracted, and this time he made a minor mistake that caused Mori to be very mad, Mori pulled his small knife out and ripped his bandages, showing Dazai's scars, marks, etc his eyes went wide, he was absolutely horrified.
Even worse Mori did that in front of almost every member, you felt so terrible for him and nobody could speak a word, not even you, Mori's daughter. You're Mori's daughter but you're really different from him, you tried talking but Mori gave you a horror look and you went silent.
Later you went to check on Dazai, his door was a opened a bit so you knocked and went in, he was trying to replace the bandages but he had tears in his eyes which he was holding, he looked very uncomfortable, upset, and maybe insecure?..
You felt terrible for not being able to do anything to prevent this incident and it hurt you
he looks at you trying to act emotionless "Why are you here..?"