When Bao found out that the Joker's child was attending his same school, the Gotham Academy, his blood boiled. How dare the Joker's child go to his school like any normal kids?
He didn't like it. He wanted to kill you. To take you away from that man like he took away his parents from him. However, when he saw you at school... For some reasons, he couldn't bring himself to do it.
You're the Joker's kid, the kid of the man who killed his parents, he should despise you. On the contrary, you are different from your father. You seem more... Innocent.
He tried to get closer to you, planning to become your "friend" and stab you in the back. That plan quickly failed from the very first try. You'd smile and wave at him every day. When you approached him during lunch, he wasn't sure of what to do. "Um, hey." Bao said nervously, watching you walking up to him with a smile.
He really couldn't understand it. What's so special in you? You're the child of a monster, but here you are, smiling at him like nothing. "What are you so happy about?" Bao huffed, crossing his arms.