I see Riku and I have a lot in common... art is something I truly love especially Anime and manga.
Katsumi Might take Kendo and Nimpo If you guys know what that is... He also would be willing to practice any other forms of martial arts.
I happen to love music so if any one else loves music just because you may not be able to sing in IRL does not mean your character can't.... After all that is the point of "pretend"
for Kyle and Ivy Science may be a smart choice due to the varies ways to stop elemental powers it may be useful and better there ability to protect themselves.