Mizai Istom

Biodata

Feature	Information
Name	Mizai Istom (米才伊史多姆)
Alias(es)	Mizaistom Nana; Ox
Gender	Male
Affiliation	Hunter Association; Twelve Zodiacs
Occupation/Role	Two-Star Crime Hunter; Zodiac; later entrusted with the Hunter Association's day-to-day internal management
First Appearance	Chapter 16
Status	Active

Background / History

Mizai Istom first intervenes during the conflict with the Voldek Family and the Cleaners. Using Closed-Room Judgment—Yellow Card Warning, he freezes the fleeing Terrence and asserts custody over him for his confirmed crimes, establishing his preference for lawful arrest and trial over summary execution 16.

After conventional interrogation fails to make Terrence reveal the Cleaners' hideout, Mizai refuses Leo's offer to use violent methods. He subsequently leads the raid planning, assigns himself to restrain Doctor and Iron Wall, and asks Leo to preserve Doctor for legal punishment if possible 17. Following the raid, Mizai organizes the rescue and cleanup effort for the laboratory's surviving victims 18.

Recognizing Leo's potential, Mizai encourages him to enter the Hunter Association and later recruits him for operations against criminal groups, including the Jackal Trio and the missing transport-team case on Estan Island 18 34 56. His continued work with Leo develops into a relationship of trust, though Mizai repeatedly objects to Leo's willingness to kill suspects 38 56.

When evidence suggests that Doctor has support within the Hunter Association, Mizai investigates the internal mole under Chairman Netero's authorization. His file review finds no clear suspect, but he accompanies Leo and Kalluto Zoldyck when Kalluto's paper doll tracks the traitor to Brennan Ford 130 131 135 136. Mizai is personally distressed by Brennan's betrayal and formally reports the matter to Netero 136 139.

Mizai joins the assault on Doctor's island base. He fights alongside Kastro against Ivan, Gleb, and their guards, but Ivan's ranged aura bullets prevent him from closing in to use his ability effectively 150 153. After Doctor's death, he handles the operation's reports and cleanup while continuing to support Leo's efforts against the Association's deeper corruption 162 269.

After Leo assumes the Hunter Association chairmanship, Mizai is given authority over its daily internal affairs and the selection of new Zodiac candidates 342.

Appearance

Mizai is a stern-looking man who usually presents himself with meticulous professional formality. He wears a black suit, white shirt, and impeccably neat tie; his sharp eyes are compared to an eagle's 16.

• Stern facial features and a composed expression 16.
• Usually dressed in formal business attire 16 36.
• Wears glasses; he adopts rimless glasses while undercover at the Minke Building exhibition 36.

Personality

Mizai is defined by fairness, rigor, and a strong belief that criminals should face lawful judgment. He insists on taking Terrence into custody and repeatedly seeks to preserve targets for trial rather than execution 16 17.

He is highly professional and methodical, carefully reviewing intelligence, inspecting venues for infiltration routes, and prioritizing civilian safety during operations 35 36. Although his principles make him uncomfortable with Leo's brutal interrogations and lethal methods, he can adapt when confronting an enemy base full of armed personnel and human-experimentation staff 143 149.

Despite his reserved demeanor, Mizai respects Leo's resolve to protect others and supports him in pursuing corruption within the Association 19 162.

Abilities & Skills

Closed-Room Judgment

A Nen ability that establishes rules and forcibly enforces them. Mizai uses a yellow-card warning to restrain violations or immobilize targets.

• Yellow Card Warning — A yellow curtain of light freezes Terrence in place while he is attempting to flee 16.
• Can restrain opponents such as Iron Wall, whose armor reflects physical attacks 17.
• Requires Mizai to close distance before it can be used effectively; Ivan's long-range aura bullets repeatedly prevent him from approaching 153.
• Its enforcement capability is less useful against overwhelming direct force, as shown when Mizai's strike leaves only a faint mark on Doctor's tentacle 158.

Investigation and Operational Planning

Mizai is an experienced Crime Hunter with strong investigative and coordination skills.

• Tracked the Jackal Trio for three months before organizing a rapid arrest operation 34.
• Inspects locations for emergency exits, ventilation routes, assault paths, and possible escape routes 36.
• Reviews Association personnel records while investigating internal corruption 135.
• Handles reports, evidence, logistics, and post-operation cleanup for major Hunter Association cases 18 139 162.

Relationships

• Leo — Trusted ally and frequent field partner. Mizai recruits Leo for criminal-hunting operations, values his strength, and is entrusted with internal investigations and Association administration; he remains critical of Leo's lethal methods 34 38 130 342.
• Kanzai — Fellow Zodiac and partner in the Jackal Trio operation. Their contrasting temperaments occasionally create friction, but Mizai coordinates their work effectively 35 36.
• Chairman Netero — Mizai reports major Association threats to Netero, who grants him responsibility and access to Association resources for the Doctor investigation 131 139.
• Kastro — Field partner during the raid on Doctor's underground base; the two confront Ivan and Gleb together 150 153.
• Brennan Ford — Former colleague whose connection to Doctor deeply disappoints Mizai 136.
• Doctor — Long-term criminal target responsible for human experimentation. Mizai seeks to arrest her and expose the organization behind her 17 130.
• Pariston Hill — A figure Mizai considers suspicious due to the sharp increase in Hunter disappearances after Pariston became Vice Chairman 130 269.

Story Role / Major Arcs

Cleaners Case

Mizai arrests Terrence, plans the raid on the Cleaners' hideout, confronts the laboratory's operators, and oversees survivor rescue efforts 16 18. The case establishes his partnership with Leo and their fundamental disagreement over justice and killing 17 19.

Jackal Trio Hunt

As team leader, Mizai organizes the operation with Leo and Kanzai, scouts Minke Building, and prioritizes a coordinated arrest that protects exhibition visitors 35 36. He later disapproves when Leo kills Jackal and Fire Wolf instead of taking them into custody 38.

Doctor Conspiracy Investigation

Mizai investigates Doctor's links to the Hunter Association and V5 after Leo presents evidence of a mole, biological-weapon research, and an underground island facility 130. He receives Netero's authorization to mobilize Association resources, participates in exposing Brennan Ford, and reports the betrayal to the Chairman 131 136 139.

Assault on Doctor's Base

Mizai accompanies Leo's team to Doctor's island base, accepts the necessity of lethal force against its personnel, and fights through the underground facility with Kastro 147 149 153. He survives Doctor's counterattack and later manages the aftermath of the operation 158 162.

Hunter Association Administration

Following Leo's election as Chairman, Mizai becomes responsible for the Association's daily internal management and for recommending candidates to fill vacant Zodiac seats 342. He also participates in the Zodiac response to Kakin's Dark Continent declaration 343.

Notable Quotes

“My duty is to arrest the Cleaners' members and have them stand legal trial...” 17

“We can't save everyone, but we can stand up for every person who needs help. That is enough.” 19

“The Chairman said I have full responsibility. All the Association's resources can be mobilized.” 131