Hey Spagato! If there's a Moomin representation in this fan-game, I would like to have Snufkin as a playable brawler, while Too-Ticky is an assist. Their character designs are a gestalt of the ones in the 90's Moomin anime and the 2024 indie game.
Snufkin would fit well, mainly because he's reponsible for committing crimes, as well as musical skills. So he could work as a thief/bard hybrid.