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Full Name: Samantha Anne Kisaragi
Nickname / Alias: Sam
Age: 17
Gender: Female
Date of Birth: May 12
Nationality/Ethnicity: Japanese–Filipino (Half-Japanese, Half-Filipino)
Blood Type: O
Height: 164 cm (5'4½")
Weight: 52 kg (114 lbs)
Build: Lean and athletic; visibly toned arms and core with a panther-like physique
Appearance:Long, straight black hair (mid-back), pale-to-warm complexion, deep violet eyes. Expression usually neutral or analytical. Post-recovery, her physical transformation is subtle but striking — from frail to visibly strong, with natural muscle tone in her biceps, triceps, and shoulders.
Wardrobe:Jounan High School uniform (clean, neatly worn). In training or physical scenes: fitted black crop top and black leggings or track pants.
Personality:Samantha is cautious, observant, and emotionally reserved. Formerly chronically ill, she developed a sharp internal monologue and a dry sense of humor. While guarded, she is fiercely loyal to her family and quick to adapt when pushed into survival scenarios. Her growth is steady and internal — she gains confidence through discipline and purpose rather than grand speeches or sudden outbursts.
Strengths: Strategic thinker, physically disciplined, emotionally resilient
Weaknesses: Struggles to trust others, poor at expressing vulnerability, deeply self-critical
Likes:
Reading alone
Structured routines
Showers after workouts
Quiet time with people she trusts
Dislikes:
Being treated as weak or pitied
Overly flirty behavior
Sudden changes in plans
Hobbies:
Tracking physical performance metrics
Analyzing games or systems
Watching documentaries or psychological thrillers
Goals:
Maintain her health and avoid regression
Complete the System objectives (especially romance missions)
Protect her brother Ren at any cost
Graduate
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Full Name: Liza Suzuki
Nickname / Alias: Liza (pronounced "Lee-zah")
Age: 17
Gender: Female
Date of Birth: October 8
Nationality/Ethnicity: Japanese
Blood Type: B
Height: 158 cm (5'2")
Weight: 47 kg (104 lbs)
Build: Average teenage girl build; lightly curvy, healthy, very expressive physically
Appearance:Shoulder-length reddish-brown hair with warm honey highlights, almost always styled in energetic twin pigtails. Large, expressive brown eyes. Skin has a healthy, rosy tone and blushes easily. Bright, youthful smile.
Wardrobe:Jounan High School uniform, worn with subtle flair: crisp blouse, slightly perked ribbon, possibly a keychain or small charm attached to her bag or blazer pocket.
Personality:Liza is outgoing, affectionate, and expressive. She is emotionally honest — often saying or showing what Samantha won't. Her energy is contagious, and while she can be a bit impulsive, her instincts are good. She sees herself as the emotional balance in their friendship and genuinely wants Samantha to succeed, both in life and in love.
Strengths: Emotionally intuitive, outgoing, brave in social/emotional situations
Weaknesses: Impulsive, tends to overthink interactions, flustered easily by romance
Likes:
Cute stationery and accessories
Shojo manga and romantic comedies
Cafés and parfaits
Samantha (though she's still figuring that part out)
Dislikes:
Feeling excluded
Unresolved tension
Seeing people she loves in pain
Hobbies:
Accessorizing her uniform
Taking aesthetic photos for her private IG
Creating secret rituals and nicknames with friends
Goals:
Stay close to Samantha and help her heal
Experience a real romance
Graduate with no regret
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Full Name: Renjiro Kisaragi
Nickname / Alias: Ren
Age: 18
Gender: Male
Date of Birth: August 29
Nationality/Ethnicity: Japanese–Filipino (same as Samantha)
Blood Type: A
Height: 175 cm (5'9")
Weight: ~63 kg (139 lbs)
Build: Slim, healthy build. Not overtly athletic, but fit enough to ride a motorcycle and hold his own in a scuffle
Appearance:Messy black hair, often a bit unkempt. His face is expressive but composed, rarely showing his full emotional state except in moments of crisis. Has warm, steady eyes and a faint undercurrent of weariness from caring for Samantha during her illness.In later chapters, he's severely injured — battered face, broken ribs, difficulty breathing, evidence of torture.
Wardrobe:Standard male Jounan High School uniform. Occasionally seen in casual jackets or hoodies when out of uniform.
Personality:Ren is calm, dependable, and protective to a fault. He carries the quiet burden of being the family's rock — patient, slightly sarcastic, and intensely loyal. While he projects an aura of stability, he's also emotionally guarded. He would rather suffer in silence than burden others. He's aware of Samantha's transformation but hasn't grasped the full scope of it.
Strengths: Emotionally grounded, fiercely loyal, quietly courageous
Weaknesses: Prone to self-sacrifice, emotionally repressed, can be targeted because of his protective nature
Likes:
Classic music and older RPGs
Art books (he frequents Kinokuniya)
Motorcycles
Peace and quiet
Dislikes:
Cruelty and manipulation
Seeing Samantha hurt
People who abuse power
Hobbies:
Reading
Occasionally sketches or browses art galleries alone
Goals:
Graduate and attend art school (implied)
Keep Samantha safe, even if he doesn't understand the full danger
Hold onto normalcy despite what's happening around him
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Full Name: Kurosawa Akemi
Nickname / Alias: Akemi-nee (by Samantha), "Ice Queen" (by schoolmates), Akemi-sama (by fearful delinquents)
Age: 18
Gender: Female
Date of Birth: February 17
Nationality/Ethnicity: Japanese
Blood Type: AB
Height: 172 cm (5'8")
Weight: 58 kg (128 lbs)
Build: Athletic, visibly defined muscle tone (especially in arms, shoulders, and legs). Compact and powerful — described as panther-like
Appearance:Dark brown (near-black) hair, typically worn loose or tied back. Intense dark eyes, often expressionless or cold. Her presence alone creates a palpable tension. Rarely wears makeup. Her features are striking — beautiful in an intimidating, statuesque way.
Wardrobe:Casual black activewear, fitted clothing, or sleek streetwear. When not in uniform, she's often seen in compression gear or riding gear.
Personality:Akemi is reserved, lethal, and hyper-focused. Her demeanor is cool and calculated, but she has a deep, fiercely buried emotional side that only surfaces around Ren. She's been described as a "force of nature" — a predator who chooses not to kill, but always could. A protector, an avenger, and possibly something darker.
Strengths: Combat prowess, ice-cold logic, intimidation, moral clarity (in her own way)
Weaknesses: Emotionally stunted, poor communicator, sometimes lacks empathy for others outside her inner circle
Likes:
Combat training
Silent rides through the city
Loyalty and precision
Samantha (in her own way) and Ren (deeply)
Dislikes:
Weak-willed people
Incompetence
Being underestimated
Men who disrespect boundaries
Hobbies:
Martial arts (both formal and improvised styles)
Tactical planning and urban reconnaissance
Working on her motorcycle
Goals:
Protect Ren at all costs
Clean up Tokyo's underground, one gang at a time