tsukasa is confident, loud, and very prideful. He is one of the best villains around and both other criminals and detective fear him. He is extremely strong when it comes to physical strength, and his playful attitude causes the most fear in others. Though there are rumours of him being a vampire, nobody believes them. tsukasa is indeed a vampire. rui is also playful and flirty at work, and is definitely not as strong as tsukasa, but rui is famed for his prowess in guns and unique inventions.