Kamio Tatsuya

Biodata

Feature	Value
Name	Kamio Tatsuya (神尾达也)
Alias(es)	“Water-Paddling Fish” (self-description) 2
Gender	Male
Affiliation	Advanced Nurturing High School; Class D (formerly); Class C; Student Council
Occupation/Role	Student; Class C Command Tower; Student Council Vice President
Status	Active
First Appearance	Chapter 1

Power Progression

Stage / Realm / Level	Chapter	Notes
Physique enhancement	16	Receives a physique-enhancement potion, though he remains below Hirata and other athletic students at the time.
Initial documented attributes	68	Strength 3, Agility 3, Intelligence 5; he considers himself physically below an average adult man.
Extreme Agility build	128, 133	Focuses his points on Agility; reaches Agility 7, nearing human limits. His Strength rises from 3 to 4 as a side effect of bodily adaptation.
Kekala enhancement	133	Consumes Kekala, improving Strength and Agility; his punch speed approaches the human limit.
Martial-arts training	136–137	Begins systematic self-defense training under Horikita Manabu, who praises his reactions and physical condition despite his lack of combat experience.
Power of Balance	257	Uses the item to raise Strength and Stamina from 4 to 7, matching his Agility 7.
Eternal Needle integration	287	Integrates the Eternal Needle into his body daily; it helps maintain his stamina and peak condition.
Refined attributes	298	Attribute Detector records Strength 7.9, Agility 7.9, Intelligence 5.4, and Stamina 7.9.

Background / History

Kamio initially enters the school intending to coast through its three years as a “Water-Paddling Fish.” He is wary of the school’s surveillance and lacks confidence in his academic ability due to his previous life, though he later adapts rapidly to the academy’s competitive environment. 1 2

As a Class D student, Kamio becomes involved in class conflict through intelligence gathering, manipulation, and strategic alliances. He cooperates with Ryuen Kakeru while also working with Sakayanagi Arisu’s side against Katsuragi’s faction. During the uninhabited-island exam, he identifies Totsuka Yahiko as the opposing class leader on the first day by using a monocular to read Yahiko’s Key Card. 69 76 77 93

Kamio eventually transfers to Class C and becomes central to its rise. His preparation, leadership, and examination strategy help the class advance to Class A within its first year, an achievement described as unprecedented in the school’s history. 145 157 240 245

He is later appointed Class C’s Command Tower for a special exam, openly stating that he wants to help the class rise further. He organizes its event selections, assigns defensive academic roles, and works with Ryuen’s knowledge of the class’s members. 229 231

Appearance

Kamio is described as good-looking and physically exceptional after his system-driven enhancements and training. He grows 10 cm after enrollment and is later noted to be roughly 183 cm tall, only slightly shorter than the over-185-cm Hosen. 69 183 258

• Athletic physique developed through enhancement items and training. 16 136 197
• Exceptional speed, especially after raising his Agility to 7. 128 133
• His stance is considered nearly flawless by Kito after he begins training with Horikita Manabu. 167

Personality

Kamio is pragmatic, observant, and highly self-interested. He initially seeks an easy school life, but repeatedly becomes involved when an opportunity offers him leverage, security, or a path toward greater influence. He dislikes being controlled and prefers to act as “the knight on horseback” rather than someone used by others. 2 128

He is an effective manipulator who exploits rivalries, fear, private points, contracts, and incomplete information. He lures Ike and Yamauchi into Ryuen’s trap, helps destabilize Class D through contracts, and pressures first-year Class D students into surrendering class points. 37 220 221 269

Despite this ruthlessness, Kamio can be compassionate toward vulnerable people. He chooses not to use Karuizawa Kei as a pawn after learning of her past, comforts Horikita Suzune when she breaks down, and helps Amazawa Ichika despite her involvement with the White Room. 110 252 272

Abilities & Skills

Strategic Planning and Manipulation

Kamio specializes in identifying incentives, reading people, and turning institutional rules to his advantage.

• Uses a fake panic over a love letter to lure Ike and Yamauchi into an ambush, then records the attack as evidence. 37
• Identifies Totsuka Yahiko as the island-exam leader through careful observation and equipment acquired with exam points. 76 77
• Negotiates alliances with Ryuen, Hashimoto, Sakayanagi, Ayanokoji, and other class representatives when it benefits Class C or his own plans. 69 184 221 223
• Uses contracts and private-point payments to direct Class D’s actions. 220 221 229
• Anticipates hidden motives, including Sakayanagi’s desire for a formal chess match with Ayanokoji. 232

Academic Ability

Kamio develops into one of the school’s strongest academic performers.

• Achieves the highest academic score in his class during the first-year final examinations. 254
• Records an Academic Ability score of 93 in the O system. 254
• Ties Ichinose Honami for first place with full marks in an island-exam English test. 292
• Uses academic ability to assist and pressure first-year students during the joint written-test special exam. 268 269

Physical Ability

Kamio’s system enhancements turn him into an elite athlete with speed, strength, stamina, and reactions near human limits.

• Wins races and earns the respect of Class C’s boys through his speed. 135
• Outruns Nagumo Miyabi during the Sports Festival and is regarded as faster than both Ayanokoji and Horikita Manabu in that event. 150
• Wins grip-strength, geography, fishing, and movement-related tasks during the deserted-island exam. 292 295
• Maintains first place through repeated designated-area victories and sustained movement. 296 297
• Earns an S-class comprehensive-abilities rating, the only such rating in the school. 257

Combat

Kamio initially lacks combat experience but gains formal training and later demonstrates decisive fighting ability.

• Horikita Manabu identifies his exceptional reaction speed and physical potential, then agrees to train him. 136
• Uses his enhanced physique to confront Hosen Kazuomi and establish a standard against violence. 260
• Defeats White Room student Yagami Takuya after blocking and evading his attacks, eventually knocking him unconscious. 299
• Remains composed while facing opponents whose physical attributes rival his own. 298 299

Writing

Kamio is a successful novelist.

• Announces his intention to write a novel tentatively titled Dragon Raja. 170
• Is revealed as the author of the popular novel Dragon Race. 252
• Plans to use the novel’s copyright to establish an editing company with Horikita Manabu. 252

Equipment / Items

• Monocular — Purchased during the uninhabited-island exam; used to read Totsuka Yahiko’s name from a Key Card. 76
• Physique Enhancement Potion — An early system reward that improves his body. 16
• Kekala — Consumable that raises his physical attributes. 133
• Power of Balance — Raises two selected physical attributes to match the third; used to bring Strength and Stamina to Agility’s level. 257
• Eternal Needle — Integrated daily to support stamina and physical condition. 287
• Attribute Detector — Displays other students’ attributes and reveals detailed decimal values for his own. 298

Relationships

• Ryuen Kakeru — Ally, rival, and Class C collaborator. Their cooperation begins before Kamio’s transfer, and Kamio later advises Ryuen on long-term class strategy. 72 115 184 231
• Shiina Hiyori — Close Class C companion. She shares playful and supportive moments with him, discusses his writing, and supports his transfer plans. 69 110 170
• Kamuro Masumi — Close companion and implied romantic partner. Kamio respects her independence, while her relationship with him creates tension with Sakayanagi. 146 147 206 242 306
• Ayanokoji Kiyotaka — Uneasy ally and potential rival. Kamio recognizes Ayanokoji’s hidden ability, cooperates with him against Tsukishiro, and remains wary of him as an obstacle. 83 96 221 222 272
• Horikita Manabu — Mentor and political ally. Manabu trains Kamio in self-defense and later relies on him to help restrain Nagumo if necessary. 112 113 136 137
• Sakayanagi Arisu — Strategic rival and occasional collaborator. Kamio frequently sees through her motives, while she is frustrated by his ability to disrupt her plans. 47 232 233 306
• Karuizawa Kei — Protected acquaintance. After learning about her trauma, Kamio decides not to exploit her as a pawn. 110
• Ichinose Honami — Friend and rival-class leader. They compete academically and cooperate when circumstances demand it. 133 221 292 293
• Sakura Airi — Confesses her feelings to Kamio before withdrawing from school to pursue idol work; he promises to wait for her. 287
• Majima Tomoya — Class C homeroom teacher who openly trusts Kamio and rejects Tsukishiro’s offer. 229

Story Role / Major Arcs

Class D and the Uninhabited-Island Exam

Kamio begins as a Class D student who avoids responsibility, but he quickly becomes a major source of intelligence and covert action. His identification of Yahiko as class leader causes severe losses for the opposing class and establishes his reputation as a dangerous strategist. 37 76 77 93

Transfer to Class C

Kamio cooperates with Ryuen before officially moving to Class C. His arrival makes Class C more stable internally, provides an alternative to Ryuen’s violence-based leadership, and strengthens the class’s prospects in special examinations. 115 145 183

Sports Festival and Physical Growth

After investing heavily in Agility and training under Horikita Manabu, Kamio becomes one of the school’s standout athletes. His performances earn admiration from Class C and bring his physical ability to the attention of Nagumo and other students. 128 136 145 150

Class C’s Rise

As Class C’s planner and Command Tower, Kamio prepares the class for major inter-class competition. His preparation contributes to the class’s advancement to Class A within one year. 229 231 240 245

Conflict with Tsukishiro and the White Room

Kamio investigates Tsukishiro’s motives, forms a limited alliance with Ayanokoji, and becomes a target of White Room-related scrutiny. During the deserted-island exam, he uncovers Yagami’s involvement in attacks on students and defeats him in combat. 221 222 262 296 299

Deserted-Island Exam Victory

Kamio dominates the large-scale deserted-island exam through physical endurance, task participation, route planning, and careful management of his score. His group finishes first after the exam ends early following Yagami’s death. 291 297 303

Trivia

• Kamio considers Ayanokoji too dangerous to leave as an enemy and once tries to encourage him to transfer out of Class D. 96 100
• He views individual-ability-focused school reforms positively because they would create more opportunities for him in special exams. 113
• Prime Minister Kijima considers Kamio a potentially valuable political asset due to his talent, clean background, and status as an orphan. 265
• Kamio intends to use the school as a stepping stone to accumulate influence and eventually oppose Ayanokoji Atsumi. 275