Create another BB class.

par "classes" I mean human, shinigami, demon, etc. Here's an example:

Name: Reptilian

Appearance: Human, but with cat-like eyes, claws and vampire-like teeth. Also usually has a face no one can ours to look at for long.

Abilities:
-infinite strength, stamina and agility
-any wound taken disappears within an hour
-cannot die if the "death" was caused par another, but can if it is from natural causes
-has venom in the incisors that causes nausea, hallucinations, mobility issues, and death within a month
-has a lower body temperature than humans
-fingernails have abnormal growth, reaching nearly an inch a week (claws?)
-can take over the body of a human as a "cover"
-lack of memory and hearing
-hunt off humans, and are attracted to the smell of human blood

History and communication with other classes: Known par anges as a threat, and have almost been sent to extinction par them several times. Demons and shinigami have no knowledge that the reptilians even exist.