2nd Gen: Tiffany (SNSD)
4th Gen: Sakura (IZONE, LE SSERAFIM)
I don't usually consciously pick. Those two became my Ults because after spending a lot of time following their group activities I leaned towards watching them more.. so they became my ults . I usually follow the group first and then see it from there. but I'm a big multi-group guy. I even have biases from groups I rarely follow (like groups with 1 or 2 songs I like).. example of that is Saerom from fromis_9, Jihan from Weekly, Mina from Girls Day, Kyungri from 9muses.