I think the unnie line are kind of the unofficial leaders
Jisoo is the one that takes the initiative in most Korean interviews but Jennie kind of leads behind the scenes. I think all members are leaders in the areas they are good at.
Jisoo. Jennie said she is like the Mum of the group, she takes care of them. Apart from things like them going to Lisa for dance advice, it’s pretty clear Jisoo is the one they turn to.