Thank you so much for the suggestions, let me address them one by one
1. yes, we had lots of ideas around it.... but it is currently on the "nice to have list", so one day hopefully we will get there
2. This is kinda what artefacts are for... we just need to make sure with a storyline or quests to put emphasis on them
3. Could you elaborate on this? I'm not sure if I fully get it, but it sounds intriguing!
To explain the final point in more detail -
You completely defeat a horror by using food it loves.
Upon doing so, a little marker of some sort will appear in the bestiary on the horror's page.
When that mark appears, there is a chance (I'd say something like 1 in 5 or 1 in 4) that the horror will recognise the princess on an encounter.
When they do, they stop advancing and you can simply keep feeding them and yourself food until the encounter is over.