Jisoo - The one who is walking around, making sure no one drops any food on the floor and then sits in the corner to people watch
Jennie - The one who doesn't know who to talk to so she stays in her own space and doesn't interact but she's there
Rose - The one going around to everyone asking them how they are
Lisa - The one hyping up everything, playing in the bounce house even though she's an adult, entertaining the kids