A vampire who works as a detective in a town inhabited by the abnormal. Believing that "investigations should be fun," he demands the lifeblood of his clients as payment for his services. In truth, he is an ancient being that was formed when nine of the most powerful vampires combined their hearts into one. However, he has now lost eight of his nine hearts, and exists in a weakened state of his former self...

The only daughter of the prestigious Reinweiß family. After losing her mother Rose 2 years ago, she has learned the sophistication and grace required of her noble status. She is bright and cheerful, and has a knack for telling if someone is hiding something. She wears a pendant as memento of her beloved mother and it appears that Arne seems to know something about its past… Behind closed doors, she is a raving “vampire fanatic,” and when she gets carried away, even Arne is taken back by her outbursts.

A mysterious being that lives inside mirrors. Moving from mirror to mirror, he can see the world that is reflected inside. Known as "The Boy Who Cried Wolf," he often withholds information or manipulates others for his own enjoyment. One way or the other, he appears to be helping solve cases, simply because "they look fun." Also, he seems to know a lot about Arne...

A legendary vampire, and one of the "Nine Kings" that gave birth to Arne. However, his brash, hot-tempered manner, along with the fact that Arne has him sealed within a stuffed toy, doesn't exactly reflect his royal status... He is always hungry and is said to have even eaten his own clothes when he was born. In reality, he's an extremely powerful vampire with a terrifying fighting prowess and the ability to control shadows. How he is wrapped up in Arne's search to recover his hearts is yet to be seen...