When Kuja arrives back on the airship, Frisk is... gone. Like they were never there in the first place. But there is a note on the deck, scrawled in their distinctive handwriting.

Hey Kuja! So I went a bit apeshit on Garland and ended up activating my melody--or trance, I guess. Turns out they're kinda the same? Huh. Anyways, I don't have a lot of time to write this down, but I'm going to be gone for a bit to complete a few loops that I started when I fought him. Don't worry, shouldn't be more than a few minutes, and I'm definitely not lost.