itch.io

I try to unlock them to (i think 27 is side event for Atzi someone bellow asked for)

There are 6 succubus:

You unlock 5th in Eldrien after visiting nadine 2 times there (diffrent days) and 6th few days after the battle of Ferania, bit i think u have to maxed out Yraselle.

The last two aren't in the game for training yet. Zoe is unlocked by visiting Nadine in Eldrien twice, and Anwen 6 days after the battle in Fernia. You may have to level Yraselle to 3, and go on first date, but I'm not sure if that is required. Scene 24 is unlocked by saving Yraselle's 2nd date until meeting The Dark Queen, and having her train magic with her. If you had her train with Dynae you have to start a new save, or reload one from before her 2nd date. Scene 27 is unlocked by getting Atzi to level 5, or 6. Followed by waiting in Dir Klou for at least 6 days after the battle there, and then taking a walk in the woods. Only triggers in Dir Klou.