how does one form a relationship with kaia,,, and/or meet her? i think i'm forgetting smth,,, anyone got hints or tips?~
As you interact with her you'll gain manticore spikes from fighting, and then while in town go to you're inventory, and inject yourself with the spikes, this will eventually lead to a special event. When you visit her on the mountain and she'll realizes you've become addicted, and will promptly have an existential crisis.
Edit: 20 spikes should be enough, but bare in mind you also need to interact with her, like having conversations a high virility helps and doing her brothel events all help make her like you more.