Komachi

Biodata

Feature	Information
Name	Komachi (小町)
Alias(es)	Yuuki Aoi-chan; Cupid Spirit; Spirit NPC 4 401 403
Species/Race	Human; manifests as a Spirit within dream worlds 400
Gender	Female
Affiliation	Shirou's family; FGO friend group 1 4
Occupation/Role	Student; FGO player; Shirou's younger sister and dream-world guide 1 401
Status	Continues seeking ways to support Shirou across worlds after the dream world's collapse 406
First Appearance	Chapter 1

Power Progression

Stage / Realm / Level	Chapter	Notes
Okita Souji possession	31	Summons and is possessed by Okita Souji, drawing Kiku-Ichimonji Norimune to confront a mutated red dragon. Her physical frailty interrupts her charge when she coughs blood. 31
Demon God Souji possession	246	Uses Demon God Souji's maximum speed to rush to Shirou during their reunion. 246
Dream-world Spirit / Cupid Spirit	400–401	Reaches Shirou through dreams with a parallel-world-traveling magic staff. As a Spirit, she can search for him and receives information about the curse and the world's plot. 400 401
High-authority Spirit NPC	403	In the story world, her NPC authority allows her to use Heroic Spirit cards, project descending swords, wield Heracles's stone axe, and deploy Shuten-doji's intoxicating smoke against Shirou's pursuers. 403
Saber-card transformation	404	Takes on an Okita-inspired swordswoman form and uses rapid footwork to evade the transformed Alexander. Her coughing and frailty remain a critical limitation. 404
Tiamat / Second Beast transformation	405–406	Converts the power of her remaining cards into a Beast card and becomes Tiamat to hold back the world's malice. The transformation leaves her unable to return to her normal form. 405 406

Background / History

Komachi grew up with Shirou and had lived with him for more than ten years by the beginning of the story. She finds his regimented routine and lack of hobbies overly old-fashioned, but openly considers herself the one person who understands and appreciates him. She repeatedly encourages him to find a girlfriend while teasing him about his personality. 1 3

An enthusiastic Fate/Grand Order player, Komachi favors Sakura Saber/Okita Souji. She persuaded Shirou to begin playing, added him as a friend, and introduced his account to her online FGO group under the name Yuuki Aoi-chan. 1 2 4

She aimed to enroll at the same school as Shirou and was later celebrated by the household for her enrollment. Around this period, she became able to undergo Heroic Spirit possession with Okita Souji, though her weak body prevented her from fighting for long. 13 31

Komachi also developed her cooking under Nakiri Erina, whom she calls her master. She eventually prepared family dinners herself, including a multi-course meal of meat dishes, vegetable dishes, and duck-and-radish soup. 29 55

When Artoria and Mashiro moved into Shirou's home as boarders, Komachi eagerly assisted them, seeing Artoria in particular as a potential partner for her brother. She helped prepare their room, accepted Artoria's gifts, and encouraged the household's acceptance of the new residents. 116 117 119

Appearance

In her ordinary form, Komachi is a cute middle-school-aged girl with short black hair. 116

• In her Spirit form, she is initially less than one-tenth human size, wears clothing made of leaves and fruit, and has transparent crystalline fairy wings. 400
• Her magic staff allows her to enlarge herself to human size and assume magical-girl-like combat forms. 400 403
• Her Saber-card form wears a white kimono, blue haori, and ribbon-tied hair, with a sword at her waist. 404
• Her Tiamat form has watery-blue hair, curved dragon horns, dragon wings, a human upper body, and a lower body connected to limitless black mud. 405

Personality

Komachi is affectionate, teasing, and fiercely devoted to Shirou. She measures helpful actions in “Komachi points,” uses humor to lighten tense situations, and eagerly tries to help the women around Shirou become part of the family. 55 117 174

Her support for Shirou is rooted in a strong belief that a happy family life is built through everyday care: cooking together, spending time together, and valuing the people who love one another. 404

Despite initially being frightened by powerful enemies, she chooses to stand between them and Shirou when he cannot fight. In dream worlds, her normally playful personality can become mischievous and ruthless toward hostile story-world entities, but she remains focused on protecting her brother and helping him find happiness. 402 403 405

Abilities & Skills

Heroic Spirit Possession

Komachi can summon and be possessed by Heroic Spirits connected to her, notably Okita Souji and Demon God Souji.

• Draws Okita Souji's sword, Kiku-Ichimonji Norimune, while possessed. 31
• Uses Okita Souji's high-speed footwork, including the three-step movement technique used to evade Alexander. 404
• Can access Demon God Souji's maximum movement speed. 246
• Her ordinary body is frail; intense exertion can leave her coughing blood and unable to sustain combat. 31 404

Dream-World Spirit Authority

Within dreams and story worlds, Komachi functions as a high-authority Spirit NPC and Cupid-like guide.

• Uses a magic staff that permits dream-world entry and travel between parallel worlds while she sleeps. 400 401
• Can shrink, enlarge to human proportions, fly, and create invisibility magic for herself and allies. 400 402
• Receives setting information about the curse, including the conditions needed for Shirou to break it. 401
• Her dream-world strength depends on imagination rather than her real-world physical limitations. 405

Heroic Spirit Cards

Komachi uses cards linked to Heroic Spirits with whom she has karmic connections.

• Archer card — Projects spiraling swords from the sky. 403
• Heracles card — Summons a stone axe and combines it with Projection and Monstrous Strength. 403
• Shuten-doji card — Produces purple gourds and intoxicating pink smoke; later uses Shuten-doji's sake to hinder monsters. 403 405
• Saber card — Grants an Okita Souji-inspired sword form and high-speed movement. 404
• Her available cards are drained to fuel her Tiamat transformation. 405 406

Tiamat Transformation

Komachi's final Beast card transforms her into Tiamat, allowing her to oppose the dream world's accumulated resentment.

• Generates black mud in effectively limitless quantity and can alter her form with dragon-like traits. 405
• Blocks and counters the giant formed from the world's malice with dragon wings, a tail, and a destructive energy blast. 405
• Exploits the giant's internal discord, then defeats it while urging its constituent spirits to understand others rather than indulge their resentment. 406
• Cannot revert to her normal form after the transformation; the effect consumes the power of her staff and other cards. 406

Equipment / Weapons / Items

• Magic staff — A gift from an unidentified foreign old man; enables Spirit transformations and parallel-world travel through dreams. 400 405
• Heroic Spirit cards — Include Archer, Saber, Shuten-doji, Alter Ego, Moon Cancer, and Beast cards. 403 405
• Kiku-Ichimonji Norimune — Okita Souji's famous sword, wielded during Komachi's possession summon. 31

Relationships

• Shirou — Her older brother. Komachi introduced him to FGO, worries over his social and romantic life, and crosses dream worlds to find and protect him. 1 2 400 406
• Nakiri Erina — Friend and cooking mentor. Komachi became her disciple while continuing to take pride in the cooking she learned from Shirou. 29 55
• Artoria — A boarder whom Komachi supports as a possible partner for Shirou; she helps Artoria settle into the household. 116 117
• Mashiro — Another boarder whom Komachi treats as an older sister and includes in her efforts to support Shirou's household. 117 119
• Utaha Kasumigaoka — Dream-world ally. Komachi protects Utaha and Shirou from pursuers, then pushes them to break the curse through their mutual feelings. 401 402 405 406

Story Role / Major Arcs

FGO Beginnings

Komachi serves as the immediate reason Shirou begins playing FGO. She recruits him into her friend group, offers to help him progress, and later gains Okita Souji as her own possession-summon partner. 2 4 31

Shirou's Household

Komachi acts as the household's enthusiastic mediator when Artoria, Mashiro, and later other girls enter Shirou's life. She helps arrange living space, welcomes guests, and actively roots for Shirou's relationships. 117 125 174

Dream-World Search

After Shirou becomes trapped in a curse-driven dream world, Komachi finds him as a small Spirit. She identifies the curse's seemingly impossible condition, guides him toward Utaha, and uses her authority to help them evade the world's brother-complex pursuers. 400 401 402

Battle Against the World's Malice

Komachi holds off pursuers with successive Heroic Spirit card forms, but Alexander's growth and the world's spreading malice overwhelm her. She ultimately draws her Beast card, transforms into Tiamat, and battles the resentment long enough for Shirou and Utaha to break the curse. 403 404 405

After defeating the giant, Komachi reveals that the Tiamat form has left her unable to return to normal. As the dream world collapses, she and Shirou say goodbye, with Komachi resolving to continue helping him find happiness across infinite worlds. 406

Trivia

• Komachi calls favorable outcomes and helpful actions “Komachi points.” 55 119
• Her FGO username is Yuuki Aoi-chan. 4
• She considers Okita Souji/Sakura Saber her favorite Heroic Spirit. 1
• In the dream world, she is initially assigned the role of a helpful Cupid Spirit, but the setting also identifies her as a potential villain meant to lead Shirou into a further nightmare. 401