I don't see why she can't be friends with Tidus and if he wants to work in a coffee shop, that's definitely an option. I like the idea of her having to work for someone else.

Prom is an excellent bro to have and maybe they could be in the same sports group. What is Tidus doing?

Also nothing like a good mystery for Senku and Tidus to sink their teeth into, and Demyx will be feeling like all these illusions have to stop so he's open for punching people.

Whoever's responsible. All. The. Punching.