Mazumi Mami

Biodata

Feature	Details
Name	Mazumi Mami (观月真寻)
Alias(es)	Liu Zheng; “Young Master”; “Master”; “Lord Mami”
Species/Race	Human
Gender	Male presentation; his public records list him as female, though he was publicly raised as male for the Mizuki family’s inheritance arrangements. 3
Affiliation	Class A of Yingtai Advanced Nurturing High School; Mizuki Heavy Industries (public identity); Shenzhou Empire (undercover mission)
Occupation/Role	First-year Class A student and leader; public heir of Mizuki Heavy Industries; undercover operative
Status	Active
First Appearance	Chapter 3

Background / History

Liu Zheng assumes the identity of Mazumi Mami, the legal heir of Mizuki Heavy Industries, while the real Mami secretly departs for the Imperial Medical Academy to receive treatment. The arrangement gives the real heir a three-year disappearance for medical care while connecting Mizuki Heavy Industries more closely to the Empire. 3

Before entering Yingtai Advanced Nurturing High School, he establishes the rules of the cover identity with Walnut, Runa Inoue, and Chisato Nishikigi. They must not call him “Your Highness” in public; instead, they uniformly address him as “Young Master.” 3

In Class A, Mami presents himself as a frail, isolated heir who wants ordinary friendships. Behind that persona, he immediately begins assessing classmates, mapping the school’s point economy, and building an information network through his maids. 6 7 11

Appearance

Mazumi Mami maintains the appearance of a refined but physically frail heir. His public cover is supported by the real Mami’s limited public photographs, while his own appearance is close enough to sustain the substitution. 3

• Short black hair. 3
• Amber-golden eyes that can pass for the real Mami’s dull yellow eyes at ordinary social distance. 3
• Slender build and deliberately maintained sickly-pale complexion. 3 6
• Often carries a cane to reinforce his public image. 11 15
• Wears his school uniform neatly and carries himself with an unusually calm, elegant maturity. 67
• Considered notably handsome by classmates and faculty. 29

Personality

Mami is calm, observant, and highly deliberate. He rarely reacts openly to pressure, instead studying people’s motives, vulnerabilities, and likely responses before deciding how to act. His first interactions at school are designed to create authority, gather intelligence, and shape Class A around his leadership. 6 7 26

He is willing to manipulate rivals and exploit the school’s systems for points, information, or contractual leverage. He views information as a business asset and routinely turns other classes’ desperation into opportunities. 50 106 152 154

Despite this pragmatism, he is attentive toward those within his circle. He organizes meals for his team, places Karuizawa Kei’s safety above intelligence gathering, and offers support to people whose circumstances concern him. 19 52 67 166

Abilities & Skills

Strategic Analysis

Mami quickly identifies hidden structures, evaluates threats, and develops long-term plans around incomplete information.

• Profiles Class A students during their introductions and identifies Sakayanagi Arisu as someone requiring focused investigation. 7
• Notices irregularities in the school’s class structure, point system, and economic incentives. 8 11 18
• Recognizes Kiyotaka Ayanokouji’s erased history as evidence of an unusual background and makes him the group’s highest-priority target. 10
• Uses Sakayanagi’s rivalry with Ayanokouji as a route to observe and test Ayanokouji. 78 92

Leadership and Organization

Mami builds authority through initiative, practical solutions, and coordinated use of his team.

• Breaks Class A’s initial silence by beginning the self-introduction session himself. 6
• Creates a class group for communication and information exchange. 7
• Gains classmates’ trust by taking control during an early point-related crisis and assigning key roles. 26
• Maintains Class A’s perfect score through coordinated intelligence gathering with his maids. 92
• Is considered by Manabu Horikita as a capable first-year who could counter Miyabi Nagumo’s influence. 120

Chess and Cognitive Performance

Mami demonstrates exceptional calculation, reaction speed, and tactical prediction in chess.

• Defeats Sakayanagi Arisu despite claiming little experience. 14
• Anticipates both her strategic preferences and psychological tendencies during their match. 14
• Attributes his performance to specialized mental “maintenance” and training methods. 14
• Encourages Sakayanagi to see her illness as a limitation on her potential rather than an absolute ceiling. 15

Physical Capability

Despite his frail public image, Mami possesses considerable physical ability and combat experience.

• States that he could exceed elite fifty-meter freestyle swimming times if he competed without restraint. 29
• Wins the boys’ swimming competition, receiving a 5,000-point reward. 31
• Previously defeated several thugs while seriously injured, though the exertion worsened his internal wounds. 44
• Stands up to Miyabi Nagumo without being intimidated during their first meeting. 165

Information Brokerage and Negotiation

Mami treats intelligence as a resource to be sold, traded, or used to gain influence.

• Sells Class B partial information on the Comprehensive Assessment Period for one million Personal Points. 50 52
• Uses Class B’s ignorance of exam rules to plan a further 1.6 million-point extraction. 106
• Offers Class C 500,000 Personal Points in exchange for contracts requiring three future tasks from each student. 152
• Raises his demands when Class D attempts to renegotiate from a weak position. 154

Equipment / Items

• Cane — Carried as part of his frail-heir persona. 11 15
• Encrypted communication devices — Used by Mami and his team; Walnut modified them to resist eavesdropping. 16
• Nutrient solution — A life-mana-based supplement prepared by Chisato and presented by Mami to Sakayanagi; it improves her vitality while placing her under a mana imprint. 16 17 23 24
• Class group and Contract System — Uses the school’s communication and contract functions to coordinate Class A and bind agreements with other classes. 7 50 152

Relationships

• Walnut — Maid and principal intelligence specialist. She investigates students, manages technical operations, and is identified in Imperial records as the top-ranked hacker codenamed “Owlman.” 9 10
• Chisato Nishikigi — Maid and close companion. Her life mana supports Mami’s plans, including the nutrient solution and remote marking of Sakayanagi. 16 88
• Runa Inoue — Maid and operational partner. She conducts detailed economic reconnaissance and uses spatial transport for equipment and supplies. 11 19
• Karuizawa Kei — A girl Mami rescued from bullies during an earlier mission despite his injuries; she sheltered and treated him afterward. She later becomes his maid and intelligence contact in Class D. 44 45 52
• Sakayanagi Arisu — Classmate, chess rival, and later ally. Mami investigates her, provides the nutrient solution that improves her condition, and allies with her to create a fair opportunity for her to challenge Ayanokouji. 10 14 16 92
• Kiyotaka Ayanokouji — Mami’s highest-priority investigation target due to his nearly erased past and apparent specialized training. 8 10
• Katsuragi Kohei — Class A ally who supports Mami’s leadership and deliberately helps strengthen his image as class representative during the swimming competition. 31 78
• Manabu Horikita — Student council president who sees Mami as a potential counterweight to Nagumo and supports his nomination for student council president. 120 165
• Miyabi Nagumo — Political rival. Mami regards Nagumo as dangerous and, after learning of his conduct toward Honami Ichinose, decides to remove him as a threat. 165 166
• Honami Ichinose — Business partner and subject of Mami’s concern. He sells intelligence to her class, later investigates her circumstances, and acts against Nagumo after learning of his harassment. 50 166
• Hiyori Shiina — Class C negotiator who accepts discussion of Mami’s conditional 500,000-point loan despite recognizing its risks. 152

Story Role / Major Arcs

Undercover Enrollment and Class A Leadership

Mami enters Yingtai under the Mazumi Mami identity alongside his three maids. He establishes a sympathetic public persona, creates Class A’s first channels of communication, and steadily becomes the class’s central authority. 3 6 7 26

Investigation of Sakayanagi and Ayanokouji

After sensing Sakayanagi’s interest in him and recognizing Ayanokouji’s unusual presence, Mami orders extensive background checks. Ayanokouji’s missing records elevate him to the group’s top surveillance priority, while Sakayanagi becomes both a potential guide to the school’s hidden systems and a future ally. 7 9 10 78 92

Sakayanagi’s Nutrient Solution

Mami has Chisato create a long-term nutrient solution for Sakayanagi. The treatment significantly improves her vitality, while its concealed mana imprint allows Chisato to sense her location and condition. 16 17 23 24

Karuizawa Kei’s Recruitment

Kei recognizes Mami as the person who saved her during middle school bullying and seeks to remain beside him. After revealing their shared past, Mami permits her to undergo a maid trial, later formally accepting her and assigning her to gather intelligence within Class D after training. 42 44 45 52

Interclass Point Economy

Mami turns knowledge of the school’s systems into a source of influence. He sells intelligence to Class B, exploits weaknesses in other classes’ planning, and offers loans or aid only through contracts that expand his future leverage. 50 106 152 154

Student Council Conflict

Manabu Horikita identifies Mami as a possible successor and opponent to Nagumo’s harsh competitive vision. After meeting Nagumo, Mami investigates his connection to Honami Ichinose and resolves to eliminate him if he proves sufficiently dangerous. 120 165 166

Trivia

• Mami’s public identity is based on a real heir whose appearance and physical condition closely match his own. 3
• He deliberately balances a sickly, approachable public image with demonstrations of competence that build Class A’s confidence in him. 6 26 31
• His team regards itself as both his servants and his family. 3
• He won 5,000 Personal Points through the boys’ swimming competition. 31