William

Biodata

Feature	Details
Name	William (威廉)
Alias(es)	Major William
Species/Race	Human
Gender	Male
Affiliation	U.S. Forces Japan; June 6th Major Case Investigation Team; Special Incident Countermeasures Bureau / Special Affairs Bureau 8 31 37
Occupation/Role	Major; task-force leader; investigator; liaison and negotiator with the Holy Infant Society 8 24 31
First Appearance	Chapter 8: “Monster”

Power Progression

Stage / Realm / Level	Chapter	Notes
Steel Body	12	While held hostage by the Ninth Guardian, William trades information on Tracking Pheromone for a Holy Son Pill. His exceptional compatibility allows him to receive Steel Body through symbiosis. 12
Partial Steel Body control	13	He secretly practices and becomes able to slightly regulate the intensity of his Steel Body. 13

Background / History

William is an American major assigned to the June 6th Major Case Investigation Team alongside Noguchi Yuji and Kuroki Niizumi after the Sato Tomomi incident. His initial assignment is tied to Lieutenant General Ricky’s interest in suspected supernatural abilities; because William knows Japanese language and culture and is notably personable, he serves as an American observer and liaison within the investigation. 8 14

During the siege of the Holy Infant Society, he recognizes the political value of the Holy Son Pill while disagreeing with Noguchi’s suspicion that its benefits must carry an unseen cost. 11 When the Ninth Guardian captures him during the breakout, William reveals that seawater can remove the Tracking Pheromone in exchange for answers about the society. Instead, he is offered a Holy Son Pill, which he knowingly accepts despite suspecting that the society gains something from its recipients. 12

William conceals his newly gained Steel Body from the military and trains to control it. He later serves as the primary communicator in negotiations with the Holy Infant, carefully presenting himself as a representative of U.S. Forces Japan while attempting to extract intelligence. 13 14 31

After the Ito Seigo fire incident, William takes a more direct command role. He intervenes in the investigation, prioritizes the Fujiwara family’s evacuation, attempts to negotiate with Ito, and coordinates armed teams when diplomacy fails. During Ito’s transformation into the Flame Giant, he continues issuing orders to protect civilians and coordinate with Noguchi and the military. 24 26 27

Following formal cooperation with the Holy Infant Society, William privately informs Ricky that he obtained his first pill while a hostage. Ricky chooses to keep the matter secret and considers using him as an infiltrator within the society. 32

Appearance

William is described as a blond, blue-eyed foreign man. He maintains a composed, presentable appearance even when rushing into sensitive negotiations. 26 31

• Blond hair and blue eyes. 26
• Identified by others as an American or “Yankee.” 28
• Often wears a broad, practiced smile during negotiations. 26 31

Personality

William is calm, diplomatic, and highly adaptable under pressure. Even while tied to a chair as the Ninth Guardian’s hostage, he focuses on gathering intelligence rather than showing panic. 12 He favors communication over violence and repeatedly seeks dialogue before resorting to combat. 26

He is also pragmatic about power. Unlike Noguchi, he believes many people would accept the Holy Son Pill’s uncertain future cost in exchange for immediate benefits. 11 His willingness to consume a pill while suspecting manipulation demonstrates both his ambition and his readiness to take calculated risks. 12

Although he initially hides his Steel Body, William is conscious that supernatural power can distort a person’s mindset. He trains to control the ability and reflects on the danger of receiving power too easily. 13 14 26

Abilities & Skills

Steel Body

William possesses Steel Body after consuming a Holy Son Pill supplied by the Ninth Guardian. He later gains limited control over its intensity through training. 12 13

• Provides reinforced skin and physical defense. 26
• Allows him to block Ito Seigo’s punch without being immediately broken. 26
• He deliberately conceals the ability from military personnel. 13 26
• William considers it only a basic defensive enhancement compared with stronger supernatural abilities. 26

Firearms Proficiency

William is a capable handgun user who can rapidly draw and fire powerful Magnum rounds in close combat. 26

• Fires three Magnum shots through Ito’s flame barrier at close range. 26
• Uses gunfire to exploit Ito’s relatively weak physical defense before the latter transforms. 26
• Provides ranged support while assigning close-quarters fighting to Toyokawa Jousei. 26

Command and Crisis Coordination

William can direct task-force personnel during volatile supernatural incidents. 24 26 27

• Orders the covert evacuation of the Fujiwara family through an underground parking route. 26
• Deploys squads to evacuate apartment residents and prepares a fireteam against Ito. 26
• Coordinates civilian protection and military response during the Flame Giant crisis. 27

Negotiation and Intelligence Work

William is the principal intermediary in several contacts with the Holy Infant Society. 13 31

• Extracts the method for removing Tracking Pheromone while held hostage. 12
• Conducts formal negotiations with the Holy Infant under expert and military supervision. 13 31
• Represents the Special Affairs Bureau in requests for U.S. military cooperation. 40

Equipment / Weapons / Items

• Handgun with Magnum ammunition — used against Ito Seigo during the Fujiwara apartment confrontation. 26
• Holy Son Pill — obtained from the Ninth Guardian in exchange for intelligence; grants him Steel Body. 12

Relationships

• Lieutenant General Ricky — Superior and confidant who assigned William to supernatural investigations; later considers using him as an infiltrator in the Holy Infant Society. 14 32
• Noguchi Yuji — Investigation-team colleague. They discuss the Holy Son Pill’s implications and coordinate during the Ito Seigo crisis. 11 27
• Kuroki Niizumi — Fellow investigator and bureau leader. William works with her on supernatural cases and military cooperation. 24 40
• Toyokawa Jousei — Supernatural ally whom William previously helped negotiate into cooperation; William relies on him for close-quarters support against Ito. 19 26
• Shiraishi Wataru / the Holy Infant — Negotiation counterpart and the concealed source of William’s Steel Body. William attempts to obtain intelligence while hiding his own connection to the Holy Son Pill. 12 13 31
• Ninth Guardian — Captor who forces the Holy Son Pill into William’s mouth and grants him Steel Body. 12
• Ito Seigo — Superhuman suspect whom William initially tries to reason with before fighting and organizing civilian evacuation. 24 26 27

Story Role / Major Arcs

June 6th Major Case Investigation

William joins Noguchi and Kuroki’s investigation following the destruction of the police station and the emergence of supernatural abilities. 8

Holy Infant Society Siege and Breakout

He debates the significance of the Holy Son Pill with Noguchi, is taken hostage by the Ninth Guardian, exchanges Tracking Pheromone intelligence, and gains Steel Body after accepting a pill. 11 12

Holy Infant Negotiations

William acts as the American side’s communicator with the Holy Infant, navigating a conversation monitored and guided by military personnel and experts. 13 He later formally confirms cooperation on behalf of Commander Ricky and the Special Incident Countermeasures Bureau. 31

Ito Seigo Incident

William investigates Ito’s connection to supernatural fires, attempts a peaceful meeting, and fights alongside Toyokawa after Ito attacks. When Ito becomes the Flame Giant, William directs his personnel to protect civilians and coordinates with Noguchi. 24 26 27

Special Affairs Bureau Operations

William requests a Holy Infant Society membership slot, assists with the bureau’s response to demons, and serves as its representative in seeking military support. 37 40

Notable Quotes

“Communication can solve many problems; we are sincere about that.” 26

“I have always preferred to ‘let a gentleman use his words, not his fists’.” 26