Shinomiya Kaguya

Biodata

Feature	Information
Name	Shinomiya Kaguya (四宫辉夜)
Alias(es)	Ice Kaguya-hime; Ice Sculpture Young Lady; “Weak and Helpless Princess Kaguya” (game-given title) 4 12
Species/Race	Human
Gender	Female
Affiliation	Shuchiin Academy; Player group
Occupation/Role	High school student; Player
Status	Alive 713
First Appearance	Kaguya-sama Wants Me to Surrender, Chapter 4

Power Progression

Stage / Realm / Level	Chapter	Notes
Shadow Walker	187	Won a Coin of Fate flip and learned a permanent active skill that transforms her into a Shadow Cat.
Witch’s Legacy Crystal Ball	372	Received from the Ice Queen; the tradable crystal ball grants fragments of magical knowledge.
MVP reward: Leg Accessory	483	Obtained a special item that lets her become a wearable leg accessory and share abilities and senses with one wearer.
Magical-item crafting knowledge	509	Received an unfamiliar memory fragment containing a method for crafting a magical item through the Witch’s Legacy Crystal Ball.
Mother of the World’s Strongest	886	Acquired the counterpart Golden Legendary unique skill to Natsuki’s “Father of the World’s Strongest”; its description identifies her as the destined mother of the world’s strongest child.

Background / History

Kaguya was raised as the daughter of the Shinomiya family, where her life was tightly scheduled and her choices were often made for her. Her family expected her to run for student council president, and she initially believed she lacked the freedom to refuse. Her mother’s return as a Guardian Spirit gave her the resolve to begin resisting those expectations. 288

Her mother died of heart disease when Kaguya was very young. Years later, Kaguya discovered her mother lingering as an earthbound spirit near the school; after Natsuki accidentally contracted the spirit, Mrs. Kaguya became his Guardian Spirit. Kaguya gradually reconnected with her mother despite finding her newfound playful personality difficult to handle. 48 49 50

Hayasaka Ai has been Kaguya’s attendant since returning to her side at age seven. Hayasaka was also assigned to monitor Kaguya amid the Shinomiya family’s internal inheritance conflict, though she remains fiercely protective of her Young Lady. 867

Appearance

Kaguya is a widely recognized beauty at Shuchiin Academy, known for her waist-length black hair, red eyes, and an outwardly glacial presence that earned her the nickname “Ice Kaguya-hime.” 4 737

• Long black hair, often tied with a red ribbon. 68
• Red eyes and a composed, expressionless gaze. 48
• Usually carries herself with formal, dignified posture. 120
• Her classmates regard her as one of Shuchiin Academy’s three great beauties. 737

Personality

Kaguya projects an aloof, unapproachable image, often maintaining a blank expression even when frightened, embarrassed, or deeply agitated. Her encounter with the evil spirit in her shoe locker and her fear while trapped by the Mirror Ghost reveal how much anxiety she conceals behind the “ice princess” persona. 4 34

She is highly competitive, especially in academics and games. Being surpassed by Natsuki in exam rankings unsettles her, and she actively seeks useful skills so she will not fall behind her companions. 159 179 She also has a practical, business-minded outlook, immediately considering whether the group could mass-produce and sell the Night Vision Potion. 393

Despite her pride, Kaguya is observant, methodical, and willing to act decisively for people she values. She records skill-test data, helps coordinate investigations, prioritizes rescuing friends over frightened bystanders, and steadily becomes more comfortable relying on others. 118 576 739

Abilities & Skills

Shadow Walker

A permanent active skill that turns Kaguya into a Shadow Cat and allows her to enter the shadow world. 187

• Grants immunity to normal physical attacks and resistance to a certain amount of mental attacks. 187
• Increases her movement speed while transformed. 187
• Has an approximately three-second activation delay, though she can still move during the transition. 190
• Leaves her clothing behind upon transformation; she commonly uses a Skin Card’s Instant Costume Change function after reappearing. 190 740
• Allowed her to break free from an unknown entity’s bodily control during the school investigation. 740
• Has a cooldown; on one occasion, it remained unavailable for another twenty minutes. 868

Analysis and Investigation

Kaguya excels at noticing overlooked details and forming deductions from incomplete information.

• Detected that a flag had moved without wind before a Daruma doll turned around. 6
• Helped reconstruct how Fujiwara Chika had unknowingly completed a haunted-house mission. 67
• Identified the timeline of a nightmare curse through changes in a victim’s search history. 576
• Connected the abandoned hospital’s artificial mountain path to the likely involvement of hospital leadership and the Ebisu God. 681

Martial and Academic Training

Kaguya was extensively trained as a Shinomiya young lady and is accomplished in both academics and traditional arts. 27

• Skilled in tea ceremony, flower arrangement, dance, guzheng, aikido, naginata, and kyudo. 27
• Her strongest discipline is kyudo; she won first prize in a national junior-high competition. 27
• Possesses notable physical strength and defeated Natsuki in a physical contest. 60
• Her principal physical weakness is low stamina, caused by a heavily scheduled upbringing with little time for ordinary exercise. 27

Magical Knowledge

Through the Witch’s Legacy Crystal Ball, Kaguya can receive unfamiliar memory fragments containing magical knowledge. One such fragment taught her a method for crafting a magical item. 372 509

Equipment / Weapons / Items

• Coin of Fate — Used to gamble on outcomes and skills. A bad flip gave Kaguya half an hour of bad luck, while a successful heads result granted her Shadow Walker. 159 187
• Witch’s Legacy Crystal Ball — A tradable crystal ball that provides magical knowledge fragments. 372
• Leg Accessory — A pink cat-shaped MVP item that transforms Kaguya into a leg accessory for one wearer at a time; the wearer shares her senses, Life Value, and most abilities. Limited exclusive skills cannot be shared. 483 617
• Skin Card / Bunny Girl Skin — Enables Instant Costume Change, primarily allowing Kaguya to dress immediately after using Shadow Walker. 740 972

Relationships

• Amamiya Natsuki — Classmate, Player partner, and eventual romantic interest. Natsuki first saves her from an evil spirit, later works alongside her through numerous instances, supports her when she runs away from home, and shares a kiss with her after returning from the post-apocalyptic world. 4 508 1048
• Hayasaka Ai — Kaguya’s personal maid and childhood attendant. Hayasaka protects Kaguya through surveillance, disguises, and skill planning, though Kaguya eventually learns that Hayasaka had concealed her identity as Hanamori. 95 508 838 867
• Mrs. Kaguya — Her deceased mother, who reappears as an earthbound spirit and becomes Natsuki’s Guardian Spirit. Their reunion gives Kaguya emotional support, though she is frequently embarrassed by her mother’s clingy behavior. 48 49 159
• Fujiwara Chika — Close friend and teammate. Chika attempts to identify Kaguya among Mirror Ghost replicas, supports her during instances, and frequently draws out Kaguya’s less guarded side. 34 118 675
• Kitagawa Marin — Teammate and Kaguya’s junior. Kaguya competes with Marin’s growing abilities while also cooperating with her in skill tests, instance escapes, and magical-item planning. 118 179 393

Story Role / Major Arcs

Early Player Incidents

Kaguya’s first major supernatural encounter occurs when an evil spirit appears in her shoe locker. Natsuki saves her with Evil Spirit Repellent Aura, beginning their direct cooperation. 4 She later becomes trapped among Mirror Ghost replicas, and Natsuki identifies her by a subtle difference in her eyes. 33 34 35

Reunion with Mrs. Kaguya

After identifying an earthbound spirit as her late mother, Kaguya helps protect her from a scythe-wielding evil spirit. Mrs. Kaguya’s later contract with Natsuki enables mother and daughter to reconnect after more than a decade apart. 48 49

Shadow Walker and Instance Growth

Kaguya gains Shadow Walker through the Coin of Fate and tests its strengths and embarrassing limitation with Natsuki. The skill becomes a core part of the team’s mobility, infiltration, and escape options in later instances. 187 190 222

Independence and Family Conflict

Kaguya chooses to run away from home, learns household chores, and experiences a more ordinary sense of belonging while living with Natsuki, Hayasaka, and her mother. She later decides to return to her own home after recognizing how constrained and dull her former villa life had become. 508 776

Shadow Clone Island Incident

Kaguya confronts a yandere version of herself, identified as her deepest fear, during the island instance. She then helps investigate the Shadow Clones, the Ebisu God, and Four Hands, contributing deductions and following Natsuki’s strategy during the operation. 526 677 681 702

Later Supernatural Cases

As an experienced Player, Kaguya can clear mechanisms alone and takes a leading role in rescues and investigations. She uses Shadow Walker to break supernatural control in a school, helps rescue Fujiwara Moeha, and continues to work with Natsuki on the King’s accident investigation. 739 740 1155 1179

Trivia

• Kaguya normally goes to bed at precisely 9:00 p.m. 61
• Her compatibility with the Cat Ear Hairpin Blind Box item is 95%, substantially higher than Natsuki’s 40%. 12
• She strongly resents the game’s “Weak and Helpless Princess Kaguya” designation. 12
• Her own figurine can reproduce the phrase: “Guilty, surrender!” 712