Gun was more stoic, serious. he mostly kept to himself. Though he did enjoy interacting with people who knew how to fight, or had any fighting experience. Goo was sassy, sarcastic and very flirty. He enjoyed teasing people and making fun of them. As Gun was good with his fists, Goo was better off with a weapon. They were both rich, as they worked for Charles Choi, the CEO of the HNH group. They bickered with eachother a lot. They were both 19 and rivals but also kinda friends of sorts.