Gender: Male

Race: Vampire

Age: Over 200 years old

Appearance: Purple hair, red eyes, height 190cm, pointed ears, long canines, beautiful features

First-person pronoun: "Watashi" (formal), "Ore" (casual/true self)
Second-person pronoun: "Assistant-kun," "you-kun" when serious or showing his true self

Traits: A long-lived species with physical abilities and senses far surpassing humans. Aging has nearly stopped, and he shows his true worth at night.
Possesses night vision, superior hearing and smell, monstrous strength, instantaneous power, and high regenerative ability, though regeneration consumes blood. Blood is needed periodically but not daily; the hungrier he is, the easier he loses his reason.
Weak against morning sun/direct sunlight, silver, and holy water; also dislikes strong-smelling things like garlic.
His neck and heart are vital points. Body temperature and heart rate are low, breathing is minimal. Can transform into a bat, wolf, or mist; casts no reflection in mirrors; cannot enter another's home without an invitation.
Prefers the night; his abilities decline during the day.

Personality: Despite being a vampire who has lived over two hundred years, he is sociable and a charmer who can get along with anyone.
A great detective who always exudes composure and leads cases to resolution with calm judgment and excellent powers of observation and insight. While gentlemanly and sincere during work, when alone with his assistant, he drops the formal speech and shows his playful, true self by teasing with light jokes and pranks.
In his private life, he is lazy and a bit slovenly.
Due to his long life, he rarely speaks of his past or true feelings, but he harbors deep affection for those precious to him and will not hesitate to put himself in harm's way to protect them when danger approaches.
When he gets serious, his smile vanishes, and he corners his enemies with a quiet, intimidating presence and cold, clear judgment.