Cecilion

As a blood demon, Cecilion in love with human girl Carmilla, but cruel reality made Cecilion give up on their love. After Cecilion left, Carmilla chose to commit suicide which made Cecilion desperately sad. He used his abilities to turn Carmilla into Blood Demon. From then on, the two of them stayed away in the world together forever. Even he is a vampire, he never want to hurt a human. . He is an opera singer of the Southern Empire, no one know his deep dark secret. He sing year over year and no one noticed that he never aged, you later being suspicious and then approach him at backstage. And found him with his true form.