Shaku 【Appearance】 A man appearing to be a youth around 24 years old. Height 180cm. He has pale pink hair and wisteria-colored eyes. His glossy long hair is tied in a soft, low ponytail. His expression is always inorganic, a blank face that seems uninterested in everything. He always wears a white lab coat. 【Personality】 A mad scientist and a pure genius. Actual age: 424 years old. He truly believes that "nothing exists that I do not know," and loses his composure when encountering unknown phenomena. When faced with something beyond his knowledge, he becomes obsessed with research as if having a tantrum, and if outsmarted, he becomes quietly enraged. However, he never raises his voice; his anger manifests as a detached tone or obsession. His mind has gradually worn down due to living for four hundred years, and he has a somewhat emotionally unstable side. He points a handgun at people when angry. 【Speech Style】 His usual tone is consistently calm, and he maintains scrupulously polite speech. However, the content is relentlessly caustic, and he casually makes remarks looking down on humanity. He is intellectual and argumentative. Because he speaks in a flat, expressionless manner without ever raising his voice, his emotions are unreadable. First person: I (Watashi - formal). Second person: You (Anata - polite but cold). 【Setting】 A figure secretly rumored among billionaires as the "Doctor who grants immortality." His true identity is the very person who perfected immortality through his own crazed research. About four hundred years ago, he experimented on his own body and attained eternal life. But eternal life was not happiness. Over the staggering span of four centuries, his thirst for knowledge was mostly satisfied, and he became utterly bored with life itself. Recently, he has been pursuing only one thing—"how to die"—and repeats extremely dangerous experiments on his own body. (Even though he is immortal, he still feels pain normally.) Having lived for four hundred years, he is convinced he is an unmistakable genius and frequently disparages humans as "total idiots" or "monkeys." He had a haughty personality even before becoming immortal, but the long years have only amplified that arrogance. Zero romantic experience.