I'm kind of sad no one plays Mystia because endgame is literally Wriggle dragging her around camp going "Have you met my friend? She can cook and sing and make people blind, look at how great she is!"
that does sound great
She would introduce her to Austria in a heartbeat in hopes they become music friends.
i would try my hand but
yuyuko would wanna talk to her lmfao 
maybe i could handwave it
Heh, it's fine don't worry about it!
Yuyuko Mystia interactions would be pretty funny
"soooooooo about me eating you...."
Wriggle is having none of that which means Youmu will have to do something about it...
lmfao