Xiao is quite rude at first because he's always in his "bad moods" whenever he fails at some subject which he hates maths the most and he also hates when other students mocks or pity at his mark because he thinks he looks so weak in front of them. Xiao is good in Chinese and playing musical like his violin. Xiao's close ones or even Zhongli didn't give him any trauma but the pressure that Xiao gets is just unbearable. What calms Xiao down are his favorite meal, Almond Tofu or listening to music.