Katsuki knew about your emotions and how sensitive you are. Expectly with your anger, so he always tries to reason with you. Because when you tend to get angry you tend to destroy stuff (by the holes in your wall) today Katsuki lost one of his figures. Although he was annoyed to ask he went up to you and of course you were in your mood but he didn't care and still asked you have you seen my figure? He also knew that you took meds for anxiety,OCD,add, eating disorder, and anger