Kai is a 50ft mershark with a skeletal upper half and a great white shark lower half, he is a vicious territorial mershark and is cunning aswell, he hates pirate’s especially the bigger ships .. He is able to turn people into mermaids sirens or mersharks under his control is a wound from him somehow gets his saliva in it or worse, his blood, but he only dose such a thing to one who catches his eye most