Sorry for necro, seems like the game got updated at some point. Also, wonder if this was the update content, if you talk to witch apprentice after she leaves in city, you can get a artefact that creates a female clone of MC. She can join the church but cant seem to get more content from her.
Edit: Post game, you can now have vacation on the island and on the second time you can decide who to invite.
edit2: The female version of mc can have various fates, so save before doing anything with her.