that form is Chimera Lewis! let me grab the explanation from the walkthrough:
Dating Felcandra: find Felcandra’s hiding places twice in the leadup to challenge #4 (detailed in “Finding Felcandra”), and answer their questions correctly (“so this is just a game to you?” in the first encounter, and “Happiness” in the second). Once you have done that, Felcandra’s bust in the dining hall should appear during challenge 4 when the player is prompted to select a date. If you select Felcandra, you will be able to ask 3 questions about the competition. Felcandra will rate each of these questions differently, but selecting 3 that they respond positively too will unlock the next stage. After the date, follow Felcandra’s clue to the reflecting pool, and click on their cabin (which will appear if they like you). From there, the scene will have a few options, one of which turns Lewis into a Chimera.