Leah is an elven protector of Kanterbury forest.
No one knows where she came from or when she started to protect the forest. By her own account, she was just passing by the forest when she saw animals cornered by a poacher. She saved the animals, then she saw another poacher, kicked him out, one thing led to another and she realized she was several decades late to her appointment.
Because most poachers are humans she developed hate towards them. Maybe someone with a good heart can change her mind someday.