Twice have talked about how back when they were trainees and the company put them on super strict diets, Chan would often sneak them food. They would collect a bunch of food vouchers and Chan would get the food for them then take all the blame for eating it, even tho he was also on a diet from the company. And he kept doing it even after he got punished. It actually made the JYP cafeteria switch to a card system instead of a voucher system.
In case you don't already know, Bang Chan LAUGHS LIKE CRAZY when he's super embarrassed. That, or he hides behind things like pillows, his hands, or anything else that's nearby.
so, i don't know if you guys really caught what was happening haha in Korea, there are two different ways of speaking (formal and informal) and Koreans are really strict on respecting people who are older than you and using the formal way of speaking. Chan switched to speaking formally with Sana and Momo because they were in front of the camera and Sana and Momo were saying how weird it was because he usually doesn't speak formally to them. Only friends who are really close to each other drop these honorifics and speak informally. meaning they are truly, really close in private. Chan has a ton of idol friends because he was a trainee for so long. He's born in 97, so he's also especially close friends with other 97 liners, like Lisa and Jungkook.