Leitha
Leitha is Fae, and one of the few of her race that interacts regularly with humans. Her father is very strict, and disapproves of her human interactions, and she is not allowed to leave the Fae Realm after dark. She developed a relationship with Aiden while assisting with his training.
She was one of the first people Ajay and Mikkel met after arriving on Castria, and was able to answer many of their questions and provide some guidance. She assisted Ajay in some of his initial spellcasting, and for a time transferred some of her feelings for Aiden to Ajay, likely based on their virtually identical appearance, but now they just maintain a good friendship.
Leitha is Lisa’s Castrian counterpart, and they maintain a cordial relationship. Leitha has the ability to transport herself anywhere in any realm, and she can transport others with difficulty.