Shizuka Hiratsuka

Biodata

Feature	Details
Name	Shizuka Hiratsuka (平冢静)
Alias(es)	Iron Fist Teacher; Kamen Rider Marta
Species/Race	Human
Gender	Female
Affiliation	Chiba International High School; Chiba teacher-training university
Occupation/Role	Teacher; university student and teaching intern; protector of Shirou
First Appearance	27

Power Progression

Stage / Realm / Level	Chapter	Notes
Saint Martha possession — offensive form	64	Achieves 100% compatibility with Saint Martha, receiving red gloves, steel knuckle armor, and Martha’s full combat power for a battle against Li Shuwen.
Marta fist-gauntlet transformation	330	Borrows and simulates Martha’s Spiritron Dress through Shirou’s light; gains azure-and-gold gauntlets, immense physical power, a dragon-pattern shield, and healing from magical energy.
Dragon-slaying martial arts awakening	331	Martha’s accumulated combat experience and dragon-slaying martial arts awaken within her, allowing her to counter the bald Magecraft user’s repeated wind attacks.
Rider Mode	333	Uses a defense-and-speed-focused form with a white Holy Robe, red cape, Holy Cross Staff, healing card, and a motorcycle controlled with Tarasque’s aid.
Lake-enhanced fist-gauntlet mode	335	Her offensive form is strengthened near the lake, where water spiritual energy continuously replenishes her power; she trades fist-for-fist with Bazett.
Marta Burst Mode	336	Her resolve to protect Shirou earns recognition from a protective Deity. The new hybrid form combines Rider armor, aquamarine gauntlets, steel boots, and a knightly helmet, balancing offense and defense.

Background / History

Shizuka grew up enjoying hot-blooded shōnen manga. Inspired by Great Teacher Onizuka, she chose to become a passionate teacher who could give hope to troubled students, studied diligently, and entered Chiba’s leading teacher-training university 338.

As a teacher at Chiba International High School, she took responsibility for student activities and was willing to pressure Shirou into competing in additional archery events after boasting about the Kyudo Club’s prospects 27. She also led exchange students on a Mount Lu trip, citing her Level 4 Chinese ability and confidence in managing the group 62.

During the Mount Lu incident, Saint Martha responded to Shizuka’s fury over Shirou’s injuries. Their perfect compatibility allowed Shizuka to confront Li Shuwen directly, ending their fight in a draw 64. When Utaha Kasumigaoka was abducted, Shizuka immediately joined Shirou’s pursuit and treated rescuing her student as the highest priority 65.

She later performed publicly in Paris in a white evening gown, revealing a side of herself her colleagues and students rarely saw. Her powerful singing made her unexpectedly popular with elderly Parisian fans 103 115.

Appearance

Shizuka is a black-haired woman with fair skin, a healthy and well-proportioned build, and notably spirited eyes. During her university period, she is described as having dark, shiny shoulder-length hair, youthful features, and an energetic presence despite wearing little makeup 103 342.

• Usually dresses practically in suits, slacks, or lab coats rather than elaborate makeup or formalwear 103.
• Her white off-the-shoulder evening gown gives her a markedly more elegant and feminine appearance 103.
• Martha’s offensive transformation uses a revealing red-and-white swimsuit-like Spiritron Dress, long red gloves, and azure-and-gold gauntlets 330.
• Rider Mode adds a white Holy Robe, red cape, cross-patterned sleeves, and a Holy Cross Staff 333.
• Burst Mode equips aquamarine gauntlets, armor, steel boots, and a matching knightly helmet 336.

Personality

Shizuka is passionate, forthright, and strongly guided by her sense of justice. She judges people by their circumstances rather than appearances, particularly wanting to help students considered troublesome by others 342 343. Even when becoming an intern limits how forcefully she can intervene, she refuses to abandon a student in need 343.

Her enthusiasm for martial arts manga and heroic transformations frequently makes her dramatic, excitable, and occasionally reckless. She admired Li Shuwen through Kenichi the Mightiest Disciple, praising the manga’s depiction of Baji Quan and reacting with amazement after sparring with the real Heroic Spirit 64.

Beneath her brashness, Shizuka is deeply protective and self-critical. She blames herself when Shirou is injured protecting her and recognizes that overestimating her borrowed power endangered him 334. Her determination becomes the basis of her strongest transformations: she considers caring for Shirou her mission and refuses to let others take that role from her 336.

Abilities & Skills

Martial Arts and Iron Fist Combat

Shizuka possesses exceptional physical courage and a direct, fist-first fighting style even before fully mastering Martha’s power.

• Can exchange powerful close-range blows with Bazett, producing shockwaves and ripples across a lake’s surface 334 335.
• Gradually acquires Martha’s dragon-slaying martial arts and combat instincts through spiritual resonance 331.
• Uses rapid punches, defensive blocks, and decisive counterattacks rather than deception or ranged tactics 330 334.
• Initially lacks formal knowledge of Magecraft and is vulnerable against a more experienced fighter such as Bazett 334.

Saint Martha Transformation

Through Shirou’s white light and her connection to Saint Martha, Shizuka can manifest multiple combat forms.

• Fist-Gauntlet Mode — her strongest offensive form; provides overwhelming striking power, magical healing, and a dragon-pattern shield 330 335.
• Rider Mode — prioritizes speed, defense, and recovery through the Holy Cross Staff and healing cards 333 334.
• Burst Mode — combines offense and defense after receiving power from a protective Deity in response to her conviction 336.
• Her transformation can be dispelled, returning both her spirit armor and summoned vehicle to Shirou’s body as white light 334.

Teaching and Student Guidance

Shizuka’s central strength is her commitment to education and student welfare.

• Leads school trips and exchange activities, including a Mount Lu excursion for students 62.
• Helps organize and support the Kyudo Club’s competitive ambitions 27.
• Earns a recommendation for an early teaching internship because of her academic effort and promise as an educator 341.
• Approaches difficult students sincerely and seeks to understand their problems rather than dismissing them 343.

Singing

Shizuka can deliver a resonant and emotionally powerful public performance.

• Performed at a Paris Academy event while dressed in a white evening gown 103.
• Her televised singing gained her a following among elderly Parisians, who sought photographs and autographs 115.

Equipment / Weapons / Items

• Transformation Belt — created from Shirou’s white light; uses a central gemstone and card slot to activate her forms 330.
• Azure-and-gold fist gauntlets — her primary offensive weapons in Marta’s combat mode 330.
• Dragon-pattern shield — materializes to provide a defensive counterpart to the gauntlets 330.
• Holy Cross Staff — Rider Mode weapon used for blocking and healing 333 334.
• Healing card — inserted into her belt to restore injuries 334.
• Tarasque motorcycle — a summoned red motorcycle used for escape and travel; Tarasque assists with steering and evasive maneuvers 334.

Relationships

• Shirou — Initially her student, whom she supports in school activities and protects during supernatural incidents. After meeting an amnesiac young Shirou in a later period, she brings him home, becomes his primary protector, and eventually acknowledges their mutual desire to remain together 27 65 330 338 347.
• Saint Martha — Heroic Spirit whose power answers Shizuka’s protective resolve. Their 100% compatibility grants Shizuka martial experience, transformation forms, and healing abilities 64 331.
• Tarasque — Martha’s dragon companion, which advises Shizuka during battle and helps operate her summoned motorcycle 334 335.
• Bazett — Initially fights Shizuka over Shirou’s custody. Their rivalry becomes mutual respect after Shizuka protects her from the professor’s scheme; Bazett ultimately remains as Shirou’s guardian 334 335 336.
• Utaha Kasumigaoka — Her abducted student. Shizuka pursues Utaha’s captor alongside Shirou and prioritizes her rescue 64 65.
• Yukino Yukinoshita — A younger acquaintance whose closeness with young Shirou makes Shizuka uneasy and jealous 331.
• Mr. and Mrs. Hiratsuka — Her parents support her even when her actions endanger her internship and complicate the family’s relationship with Shirou 332 347.

Story Role / Major Arcs

Mount Lu and Li Shuwen Incident

Shizuka leads students to Mount Lu, then becomes involved in the pursuit of Utaha’s Servant kidnapper. Saint Martha’s power allows her to battle Li Shuwen, and she later joins Shirou in defeating him and saving Utaha 62 64 65 67.

Paris Performance

While accompanying a Paris Academy event, Shizuka performs publicly in an evening gown. Her unexpectedly powerful singing earns widespread admiration and local popularity 103 115.

Guardian of Young Shirou

After an amnesiac young Shirou arrives in her world and is targeted by Magecraft users, Shizuka refuses to abandon him. She accepts Saint Martha’s power, defeats the pursuing bounty hunter, and commits herself to Shirou’s safety 330 331 333.

Conflict with Bazett and the Clock Tower Professor

Shizuka fights Bazett when Bazett attempts to bring Shirou to the Mage’s Association. Despite their clash, Shizuka later defends Bazett from a betraying Clock Tower professor and awakens Marta Burst Mode to defeat him 334 335 336.

Teaching Internship

While Shirou trains to become stronger, Shizuka devotes herself to her studies and begins an early teaching internship. Her commitment to helping difficult students is tested by conflicts involving Toukan Nao and Teacher Dongguo 341 343 345 347.

Notable Quotes

“I met Shirou, and then I brought him home. I want to take care of him. This is my mission, my responsibility! No one can replace me!” 336

“Humans’ strength has never come from their genes, but from their Belief!” 336

“I promised I’d protect you, so as long as those bad guys are still around, I won’t abandon you!” 333

Trivia

• She is an avid fan of hot-blooded manga and still follows Shonen Jump as an adult 180.
• She regards Li Shuwen as a legendary figure due to his portrayal in Kenichi the Mightiest Disciple 64.
• She occasionally participates in racing activities and proudly records personal-best driving times 180.
• Her first Martha transformation embarrasses her because its Spiritron Dress is far more revealing than the armored heroine outfit she imagined 330 331.