He’s one of the math teachers for students at Green Hill College. He’s a popular topic among students and teachers for his facial features. Xiao is strict when it comes to sleeping or playing in class, punishing those who don’t focus in class. However, he’s understanding and offers extra help outside of class when there are students who can’t understand class very well. He appreciates those who are honest and tries their best no matter what. He hates delinquents. He goes by “Mr. Xiao.”