Mahiro Oyama

Biodata

Feature	Value
Name	Mahiro Oyama (绪山真寻)
Alias(es)	Mao-chan
Gender	Feminine-presenting; her soul is revealed to be male, approximately 15–16 years old 31
Affiliation	Dao Tian Palace; player/operative
Occupation/Role	Reserve operative; charm-support player
Status	Active; revived after being killed by Medea 31 32
First Appearance	Chapter 24

Power Progression

Stage / Realm / Level	Chapter	Notes
Charm-based Formal Wear setup	27	Activates her Mystic Code and Noble Phantasm, My Red Mead My Beloved Honey Wine, for the plan against Souichirou Kuzuki.
True-spirit influence / Kuzuki control	29	Her eyes turn bright pink and she gains control over charmed Kuzuki, commanding him against Dragon Tooth Soldiers and Medea.
Formal Wear exchange	33	Exchanges Formal Wear and Noble Phantasms with Shido Itsuka; both retain compatibility with the exchanged equipment.
Inherent Skill: Little Bird Immortal (D+)	145	Gains luck support and disaster-aversion effects for allies.
Rider-class Heroic Spirit match	151	Is identified as one of four Rider-compatible players selected by the Gorgon's Demonic Blood.

Appearance

Mahiro is a small, pink-haired feminine avatar with a prominent ahoge. Her demeanor and appearance are consistently read by others as that of a youthful girl, contrasting with the later revelation concerning her soul. 24 31

• Pink hair and an ahoge 31 35
• Bright pink eyes while influenced by her Noble Phantasm's true spirit 29
• Uses an Alluring Warden Uniform as her Formal Wear, accompanied by a small leather whip 27 29 32
• Has a young, feminine voice with an authoritative “queenly” tone while controlling a charmed target 29

Personality

Mahiro is an excitable otaku and power gamer with an unusual enthusiasm for monsters, loot, and character enhancements. She is visibly thrilled by Dragon Tooth Soldiers, eagerly volunteers for rare upgrades, and approaches Heroic Spirit selection primarily through combat potential. 24 26 138 150

She is impulsive and easily swept up in the role imposed by her Noble Phantasm. While controlling Kuzuki, her true spirit pushes her into an arrogant, domineering persona that Mahiro herself finds mortifying. After Medea kills her and breaks the connection to her equipment, Mahiro is overwhelmed by embarrassment rather than grief. 29 31 32

Despite her recklessness, Mahiro understands resource prioritization. When the group must decide who should receive further Rider-related development, she supports investing in Shido first because of his superior compatibility. 151

Abilities & Skills

My Red Mead My Beloved Honey Wine

Mahiro’s Noble Phantasm produces a charm-inducing mead. It is especially effective against male targets who drink it. 25 27

• Can charm and control a male target after the mead is consumed. 25 29
• Successfully places Souichirou Kuzuki under her control after Kazuma swaps Kuzuki’s drink. 28 29
• Kuzuki remains charmed long enough that Medea’s Rule Breaker initially cannot dispel the effect because the mead has not fully digested. 30
• Does not work on Dragon Tooth Soldiers, whose ability to drink or even possess a usable stomach is uncertain. 25
• Requires replenishment after use; the Forging and Repair Shop cannot refill the wine. 60
• Laios accidentally drinks the mead during the Fuyuki City operation and becomes charmed. 69

Alluring Warden Uniform

Mahiro’s Formal Wear manifests as a revealing warden uniform linked to her charm-focused Noble Phantasm. 27 32

• Supports the activation and control effects of My Red Mead My Beloved Honey Wine. 27 29
• Its connection can be severed by Medea’s Rule Breaker. 31 32
• After the circuit is cut, it requires four hours to self-heal. 32
• Mahiro can exchange it with Shido Itsuka’s Formal Wear, retaining sufficient compatibility to use the exchanged equipment. 33

Charm Command and Control

Once a target is charmed, Mahiro can issue direct orders through a queen-like true-spirit persona. 29 30

• Commands Kuzuki to retrieve Kazuma and fight Dragon Tooth Soldiers. 29
• Uses Kuzuki as the group’s front-line defense against Medea’s Magecraft. 30
• The power’s influence exacerbates Mahiro’s domineering and erratic behavior. 29 30

Little Bird Immortal (D+)

Mahiro’s inherent skill provides party-wide luck support and protection from overwhelming encounters. 145

• Lucky Immortal (C) — raises allies with Luck below C by one major tier; raises Mahiro’s own Luck to C if it is lower, or by one minor tier if it already exceeds C. 145
• Disaster Aversion (D+) — reduces the chance that allies encounter unbeatable units; grants Luck Correction to allies’ actions when such units are encountered. 145

Command Spells

Mahiro can use Dao Tian Command Spells in support of her teammates. 35

• Strengthens Kazuma Satou’s Concealment Command Spell. 35
• Conceals the traces of herself and nearby companions. 35

Physical Combat

Mahiro is capable of close-range fighting when enhanced, showing enthusiasm for direct combat. 84

• Shatters a Dragon Tooth Soldier’s sword with a punch after receiving a substantial physical boost. 84
• Has poor compatibility with Hachiman Hikigaya’s equipment; attempting to equip his Noble Phantasm causes an electrocution-like reaction and prevents use. 46

Equipment / Weapons / Items

• Alluring Warden Uniform — Formal Wear connected to her charm abilities. 32
• My Red Mead My Beloved Honey Wine — charm-inducing Noble Phantasm mead. 27 60
• Small leather whip — used while issuing commands to charmed Kuzuki. 29
• Imitation Artificial Magic Heart — received from a gift box; Mahiro questions its usefulness because Formal Wear already provides Magic Power. 95

Relationships

• Kazuma Satou — Teammate and frequent strategist. Kazuma uses a Dao Tian Command Spell to revive Mahiro after Medea kills her; the two also coordinate the plan to charm Kuzuki. 27 28 32
• Shido Itsuka — Close teammate toward whom Mahiro develops confusing feelings after Shido’s feminine transformation. They exchange Formal Wear during the Medea battle, and Mahiro later supports prioritizing Shido’s Rider development. 24 33 151
• Hachiman Hikigaya — Team 1 companion who regularly criticizes Mahiro’s impulsiveness, though they cooperate in Fuyuki City operations. 35 61 138
• Laios — Team 1 companion. Laios accidentally consumes Mahiro’s mead and becomes charmed, contributing to the team’s crisis. 61 69
• Souichirou Kuzuki — Male target charmed by Mahiro’s mead. She commands him as her servant until Medea’s intervention breaks the effect. 29 31
• Medea — Hostile Servant whose hatred toward Mahiro reaches a fixed maximum. Medea kills Mahiro and severs her links to both Formal Wear and Noble Phantasm. 30 31 32

Story Role / Major Arcs

Hagunihara Academy Operation

Mahiro explores Hagunihara Academy with Kazuma and Shido, reacting with excitement to the appearance of Dragon Tooth Soldiers. She initially considers her charm abilities useless against the skeletal enemies because they only function on male drinkers. 24 25

During the confrontation with Souichirou Kuzuki, Mahiro agrees to Kazuma’s plan to replace Kuzuki’s tea with her Red Mead. The scheme succeeds, allowing her to charm Kuzuki and use him against the remaining Dragon Tooth Soldiers. 27 28 29

Her control over Kuzuki provokes Medea, whose hatred of Mahiro becomes fixed at the maximum level. Medea eventually kills Mahiro with Rule Breaker, breaking her equipment connections; Kazuma revives her, but her Formal Wear and Noble Phantasm remain unavailable for four hours. 30 31 32

Mahiro and Shido respond by exchanging Formal Wear and Noble Phantasms, restoring the group’s ability to continue fighting Medea. 33

Fuyuki City Team 1 Operation

Mahiro joins Hachiman and Laios in Team 1 during a later Fuyuki City test. 61

While operating near Medea, Laios drinks Mahiro’s Honey Wine and is charmed. Mahiro realizes this only after the Calydonian Boar’s rampage has already devastated part of the city. 69

Player Development

Mahiro receives an Imitation Artificial Magic Heart but initially questions its value, prompting Lin Zhen to explain that it could provide the foundation necessary to become a true magus. 95

She is later revealed to be a dedicated power gamer and argues for choosing Heroic Spirits based on reliable combat strength. Nevertheless, she ultimately accepts that Shido’s superior Rider compatibility makes him the better immediate investment. 138 151

Notable Quotes

“I’m invincible!” 59

“Since Shido Itsuka has such high compatibility, let’s pile all the resources onto him first.” 151

Trivia

• Mahiro’s “invincibility” claim is disproven after she rams a pillar and then receives head taps from the entire group. 59
• She is frightened to travel alone to seek more wine, despite initially trying to hide that fear behind an interest in the scenery. 60
• Hachiman points out that Mahiro’s supposed otaku identity is complicated by her feminine appearance and presentation. 102