What would the main 4 + Grilby do if their soulmate was a amazing musician, but they always played their songs in private, like in Waterfall?
He doesn’t really bother you about it. He’ll listen to you play from the shadows, then get back to his station. He never brings it up with you, but does ask now & then how your practices are going, since he knows that you play, but he won’t ask where & when. What you do is your business, after all.
He listens for a little bit in silence, & immediately bursts into applause the moment you stop playing. Wowie!! What a show!!! You’re so talented–he’s sure Waterfall would clap, too, if it weren’t a mass of land that had no hands. He’s not sure why you like to play to an empty room, but if there are any ghosts around, he bets they enjoy it too!
She listens to you from afar, but confronts you when you get back home. Babe, you’re amazing–why don’t you share your talent more often? She’s got a piano for a reason, & you won’t even play for her? What is it that you’re so scared of? She’s desperate to get you more comfortable with playing in public, you’ve gotta show people what you’re capable of!
She watches you via her cameras, adoring your performances from afar. Her shame keeps her from ever really telling you that she’s heard your music before, but she does offer now & then to give you music to practice with (it’s mostly anime openings/soundtracks) on the hopes that one day you’ll play for her personally.
It’s a shame. He can’t venture out to Waterfall very often, it’s too humid & damp for his liking. But he hears about your ventures through the grapevine, & only then does he question you about it. He doesn’t beg you to play for him or anything, but he does get a little frustrated that you don’t even feel comfortable enough around him to play one song.