The girl covered in blood and not a clue how it happened
Kirsten, when she's not frustrated, is a genuinely kind person who is usually surprised when people do anything for her. But losing her memories has made her a very frustrated and stressed person. She wants to desperately remember something - anything - but she can't and it drives her crazy.
Kirsten is a soul-hunter who has control over the element of water. Currently she is learning how to master it as she only just recently figured out she is one.
Kirsten can't remember anything. It's just dark, as if she were asleep and then suddenly woke up with covered in blood. She wondered around until she found some other soul-hunters, Zach and Danny. They told her she is one of them as well and now she must master her element of water and learn every aspect of being a soul-hunter while trying to recover her memories of who she is, where she came from, and what happened that night.