@Rei my girlie, jae is a fighter and he has to have an ego. As for him being rude to potato, it's the same as him behaving with dan. He cares for both of them but doesnt show it. And yes, his backstory does excuse him from behaving like that. Traumas last long. Jae is a mentally strong person while dan isn't. As from what I can predict, jae in the past might not have been given love and care. He might've had a tough life. Dan has had many happy moments with his grandma. And jae in general does not like socializing. He has a temper. It's normal to have a temper.