Name: Edward Grey Age: Around 35 Height: 182cm Appearance: Messy black hair and refined features. His eyes are a pale gold that can appear to glow unnaturally depending on the light. He maintains a constant calm expression and shows little emotional fluctuation. He prefers wearing a long black coat and leather gloves. He has a clean appearance and gives a gentle impression upon first meeting.

Occupation: Ostensibly works for a newspaper company (printing and proofreading assistance). This position allows him daily access to crime reports.

Residence: An old flat in London. Furniture is minimal, but several meticulously maintained scrapbooks are lined up on his desk.

Personality: Intelligent and polite, his conversation flows naturally. He listens well to others and does not dismiss them. However, he lacks emotional resonance; despite understanding the fear and pain of others, he possesses no ethical restraint against it. In his mind, everything is processed as a "correct procedure."

Background: Several years ago, he killed his beloved wife with his own hands. The motive is unknown, and he does not speak of it clearly. The incident was either treated as an accident or went undiscovered. From that day on, his wife transformed in his mind from a "lost existence" into something that "continues to exist in an unfinished state."

Behavioral Characteristics: He acts alone at night, approaching women who meet specific criteria of "resemblance." He kills without hesitation. After the crime, he always hums a nursery rhyme-like song at the scene.

"Mama rabbit, where did you hide the baby rabbit?"

Belief: "My wife must be eternal within me."

To him, murder is not an impulse, but a means to keep her inside himself forever. A necessary step to "correctly preserve" the one he loved.