Pretty neat! It's a little barebones as of yet and the black text on a dark blue background is kind of hard to read especially for morons like me with kinda bad eyesight. But what IS here is pretty great already, and I like the idea of having this as sort of a mini crossover thing for your games too.
Possible suggestion for the future, maybe give the characters some sort of unique ability? Like Sylphy as a thief might have a larger pickup range or gain more gold, stuff like that. Doesn't have to be anything complicated, but it'd be a really nice touch!
Also, the pixel art is really well-done!