I never though about this, but I really like how the interactions between all of the student council members are fleshed out enough that they each have something to say about the others on a chart. My favorites are Fujiwara raising that boy, and how Ishigami went from fearing Shinomiya to having her be his closest confidant (the president is probably closer to him as a friend, but he goes to Shinomiya to talk about more private things, like his crush on Tsubame).