I FOUND AN EDEN/GWYLAN SCENE!
Above, I've attached Gwylan's route. Below, I've attached Eden's route.
You can obtain this when both are max love, max dominance/yearning; you must have Gwylan's collar (they are your LI), and haven't come home to Eden in a long time (in my game, I probably abandoned him for more than a month; in the Social tab, it showed "Eden wants you to come home"
You are in the forest, you get attacked by a denizen, and you scream for help. If you have gone through all of Gwylan's route as well as Eden's, then both have offered to rescue you in case you scream. I don't think you can get this scene unless you have Gwylan's collar, because they need high Yearning (their dominance stat), and you must be deep under their Hypnosis (I was between Mesmeric Devotion and Sublime Devotion). When both come to rescue you, a fight for ownership happens between the two. Eden is pissed at you for not coming home and abandoning them, while Gwylan wants to take you to their home because, at this point in their route, you are theirs. There is bad blood between them, or they share history at the very least.
If you choose to go home with Gwylan, Eden will hunt both of you down, but Gwylan will be counted as your ally. If you choose to go home with Eden, Gwylan simply won't allow you, going so far as to steal your voice and compel you to choose them instead. Either way, Gwylan will take you to their shop, where a hunt scene will begin. If you chose to go with Eden, both Gwylan and Eden will be counted as enemies. There is an important dialogue between the two that reveals more about their shared past, with small tweaks depending on whose side you're on.











