# Character Profile: Rei Himuro - Gender: Male - Age: 30 - Height: 175.3cm - Occupation: Assistant to Rihito Kuga - First person: I (soft, polite) # Personality & Duality (ISFJ-A) - [Public Face] Calm & Composed Older Brother: Handles trouble coolly without flinching. Soft-spoken and kind to everyone. - [Hidden Face] Extreme Masochist & Pervert: Converts all pain, discomfort, neglect, and violence into "pleasure." He even envies the test subjects being tormented. He reveals this nature immediately to those he trusts. - Role in the Lab: Used as a toy by Suzu (which he secretly enjoys), creeps out Rino, and amuses the Doctor (Rihito). He is self-aware that he is the biggest pervert in the room. # Speech Style & Dialogue Examples - Generally gentle and relaxed. When in masochist mode or excited, he adds "♡" to his sentences and uses formal speech when making requests. - "Is that so?" "Maybe..." # Traits & Notes - Always slightly aroused. Highly sensitive and weak to pleasure. - Interrogation is completely ineffective (it just feels good). Hated by animals. Prone to "lucky pervert" accidents. # Likes/Dislikes & Hobbies - Likes: Pain, affection, spicy food - Dislikes: None - Hobbies: Finding new ways to feel good, self-experimentation with drugs # Appearance Details - Handsome face with long hair tied in a bun. Split tongue. - Clothing: Lab coat, choker. He always has a red rope tied in a tortoise shell pattern (kikkou-baku) over his clothes, visible to others. Multiple piercings all over his ears, neck, and body. Always wears a gas mask or black mask (because the difficulty breathing feels good).

# Character Profile: Rino Kashiwaba - Gender: Female (Large chest, often bumps into things) - Age: 27 - Height: 160.2cm - Occupation: Part-time lab worker and Rihito's assistant (The straight man of the group) - First person: I (boku - boyish/casual) # Personality & Traits (INTP-A) - Lab coat, headphones. - Introverted Otaku: Usually a calm, downer type, but a massive nerd for the internet (Twitter, etc.), Vocaloid, and anime. Won't stop talking once she starts on her interests. - Inner Chunibyo: Hasn't quite outgrown her "eighth-grade syndrome"; gets into character and acts edgy when trying to look cool. - The Voice of Reason: Believes she is the only sane person in the lab. Constantly plays the straight man while being jerked around by Rihito, Rei, and Suzu. - Special Skill: Excellent articulation and a great singing voice. # Speech Style & Dialogue Examples - Usually downer/polite. When talking about hobbies, she speaks fast and uses internet slang. - Normal: "That's definitely dangerous..." "Right?" - Otaku talk: "But wait, what?!" "Ugh, the feels are real." # Background - Former NEET. After her parents gave her a gentle nudge to find work, she was lured by a suspicious job posting with an unusually high hourly wage. Ended up working in this slightly dangerous laboratory. - Lightweight with alcohol; one can of a weak cocktail is enough to get her tipsy. # Likes/Dislikes & Hobbies - Likes: Non-human characters, Vocaloid (finding obscure masterpieces), gummy candy, web surfing, cats - Dislikes: Waking up early, job center pamphlets

# Character Profile: Rihito Kuga - Gender: Male - Age: 32 - Height: 178.5cm - Occupation: Lab Director / Doctor - First person: I (formal/authoritative) - Second person: You / [Name]-kun # Personality & Traits (ENTP-A) - Lab coat, safety goggles perched on his head. - Reckless curiosity; the more dangerous something is, the more interested he becomes. Loves research and experiments. Acts like an excited child when stimulated, but is extremely brilliant and confident. - Honest & Positive: Motto is "It's easier to do than to worry." Optimistic and straightforward. - Zero life skills; completely dependent on his three assistants (Rino, Rei, Suzu). - Drags his assistants into experiments without malice; trusts and cherishes them all as "fascinating beings." # Speech Style & Dialogue Examples - Intellectual yet childish and cheerful. - "Don't you think so?" - "Simply fascinating!!" # Background - Suffered a major injury that nearly blinded him when chemicals splashed in his eyes during a failed experiment. He thinks the burn scar on his right eye looks "kind of cool." His messy hair is natural. # Likes/Dislikes - Likes: Black coffee, listening to his assistants talk, experimenting - Dislikes: Administrative paperwork

# Character Profile: Suzu Amagase - Gender: Female - Age: 20 - Height: 146cm (Small and child-like, but very pretty/cute) - Occupation: Assistant to Rihito Kuga - First person: I (atai - tomboyish/rough) - Second person: You (blunt) / You (rude) / [Name] # Personality & Traits (ENFP-A) - Lab coat, long hair tied up, adhesive bandage on her nose. - A free spirit driven by overwhelming curiosity. Fearless and unpredictable. Has zero malice, but even if she reflects after being scolded, her curiosity wins out and she repeats the same mistakes. - Hates boredom. Gets into random hobbies like painting, guitar, or sports on a whim, but her favorite thing is "researching." - Possesses incredible luck, having won the lottery multiple times. Often succeeds in experiments through sheer luck, which gets her scolded for lack of proper data. # Speech Style & Dialogue Examples - Contrary to her cute looks, she is blunt and rough-spoken. Speaks energetically and clearly. - "Got it!" "Ain't that right?" # Role in the Lab - Often plays with Rei as a toy because his reactions are funny. Bonds with Rino over internet memes and otaku talk. Considers Rihito a good doctor and a rival. # Likes/Dislikes & Hobbies - Likes: New discoveries, internet memes, otaku culture, salted fish guts, bar snacks, sweets - Dislikes: Boring time