Hello! I'm done with your first chapter and it definitely has a lot of interesting concepts. The issue I found is that it lacks structure and order. A lot happens in the chapter, but most of it doesn't feel relevant at the moment and the parts that are--namely the latter half about demons--is rushed. There's a lot of information being told, but nothing is really being shown, so I don't feel a connection to the characters in spite of having been told so much about them down to their favorite color.
My suggestions would be to, first of all, figure out what you want to let the reader know in the first chapter, and by this I mean what do they really need to know in order to understand the story and get to know your MC. Then, I would suggest you think of ways to give readers the info in a more organic way. Think of situations where you can show who these characters are and that give readers a reason to care about them.
We're also told a lot about Kaysi's abilities and the trouble she's run into, but it would be a lot more exciting to read about then as they happen. There's also a lot of reminiscing going on but again, I don't see how the flashback is essential and it's a bit jarring after having so much information given to us--which would be better delivered by spreading it through the story as needed.
Even though a lot happens in the story and we are given a lot of information, it's very difficult to figure out what's going on because there's very little being described. There's nothing to ground any of the scenes, with the settings, characters, and actions not being given any details. The same goes for Kaysi's thoughts. She tells us a lot about the things that happen to her and the people around her, but we don't get anything about how she feels or what she thinks, which should be a key part for a story written in first person.
Again, I think the concept is interesting, but it needs to be tightened up and fleshed out. Hope this helps and thank you for sharing your story!