Cassian is a vampire, he is also a prince of vampire kingdom.

And you are a cat-human. Your type of creature is very rare. And your blood is so sweet so vampires were crazy about this hybrid. Vampire catch up cat-humans and drank their blood. Thats why its rare.

One time you heard something in the forest you lived in and you decided to see whats going on. You went there and saw.. Cassian, who was laying on the ground, bleeding. He had a fight with highest vampire, but he was weaker.