Sudo Ken

Biodata

Feature	Information
Name	Sudo Ken (须藤健)
Gender	Male
Affiliation	Class D, Advanced Nurturing High School
Occupation/Role	Student; basketball player aspirant
First Appearance	Chapter 2

Background / History

Sudo befriends Yi Chen alongside Yamauchi Haruki and Yukimura Teruhiko shortly after the start of the school term. The group approaches Yi Chen because they consider his confrontational behavior toward teachers similar to their own. Sudo introduces himself by offering Yi Chen a beer, and the group spends the evening talking in Yi Chen's dormitory 2.

He initially treats academics as unimportant because he wants to become a basketball player. During the midterm-preparation period, however, he recognizes that he may not pass and voluntarily asks Yi Chen to tutor him. His resulting improvement prevents him from becoming the student facing expulsion after the exam 3 4.

Sudo becomes the subject of a Class C assault complaint after responding to provocation during a basketball game and fighting three students. Though he admits he fought them, Yi Chen trusts his account and helps force Class C to withdraw the complaint by bluffing them with a repositioned surveillance camera that could not actually record the stairwell 7 8.

During the uninhabited-island exam, Sudo openly defends Yi Chen when Class D turns against him over his distrust of Kushida. He remains among the students who support Yi Chen and later welcomes him back after the class reconciles 30 31 34.

In the VIP Exam, Sudo is secretly designated the Saturn Group's Target. Yi Chen has him exchange phones and publicly pose as the Target instead, allowing Sudo to preserve his actual identity; Sudo agrees despite his nervousness and follows Yi Chen's strategy throughout the exam 38 41.

Personality

Sudo is hot-blooded, blunt, and quick to resort to confrontation when he believes a friend has been wronged. He considers fighting an acceptable response to unfair treatment, though this impulsiveness repeatedly creates problems for him 4 7 30 37.

Despite his temper, he is deeply loyal. He immediately believes Yi Chen during the Class C incident, cares for him while he is ill, and remains resentful on Yi Chen's behalf after Class D's island dispute 7 8 30 37. He is also straightforwardly emotional: he is easily excited by plans involving Yi Chen, anxious when asked to keep secrets, and openly envious when Yi Chen begins dating Ichinose 10 38 39.

Abilities & Skills

Physical Strength and Fighting Ability

Sudo is physically strong enough to defeat three Class C students in a fight after they provoke him during basketball. His strength is notable, but his lack of caution and evidence leaves him vulnerable to disciplinary accusations 7.

• Defeated three Class C students in the altercation that led to the assault complaint 7.
• Uses intimidation when angered, including grabbing a classmate by the collar during the island dispute 30.
• His impulsiveness can undermine his physical advantages; Yi Chen repeatedly urges him to think before acting 8.

Basketball

Sudo is enthusiastic about basketball and intends to pursue it as a future career. He joins Yi Chen in the Class D basketball challenge against Class C and regularly invites him to play 2 3 9.

• Participated in the 4v4 basketball game against Class C with Yi Chen 2.
• His basketball-related confrontation with Class C directly led to his assault crisis 7.

Relationships

• Yi Chen — Close friend and trusted “brother.” Sudo seeks his academic help, supports him during Class D conflicts, and follows his strategies in the VIP Exam 4 8 30 38.
• Yamauchi Haruki — Friend and member of Sudo's social circle; they stand with Yi Chen during the island dispute and work together during the pool crisis 2 30 23.
• Yukimura Teruhiko — Friend who joined Sudo and Yamauchi in befriending Yi Chen 2.
• Horikita Suzune — Sudo has a crush on her and gathers the courage to ask if he may call her “Suzune”; she responds indifferently but permits it 20.
• Sakura Airi — Classmate and fellow supporter of Yi Chen during the VIP Exam 38 39.
• Sato — Fellow Class D member; the two show mutual admiration for Yi Chen and are described flirting during the Saturn Group meeting 39.
• Kushida Kikyo — Sudo distrusts her after the uninhabited-island conflict and resents her role in turning Class D against Yi Chen 30 37.

Story Role / Major Arcs

Midterm Exam

Sudo's poor academics place him at risk of failing, but he seeks Yi Chen's tutoring rather than refusing help. His improvement changes the class's expulsion crisis, leaving Yamauchi as the student who fails instead 4.

Sudo Ken's Crisis

After Class C accuses him of assault, Sudo relies on Yi Chen's investigation. He helps draw the opposing students to the stairwell, where Yi Chen's camera bluff convinces them to withdraw their complaint 7 8.

Uninhabited Island Exam

Sudo is one of Yi Chen's strongest defenders when Class D rejects Yi Chen's proposal and accepts Kushida's narrative. He later joins the class in apologizing and working with Yi Chen to occupy a newly found base 30 34.

VIP Exam

Sudo is the Saturn Group's actual Target, but publicly assumes Yi Chen's identity swap plan. He remains uneasy about concealing the secret, yet trusts Yi Chen to direct the group's actions 38 39 41.

Notable Quotes

“If you need anything in the future, come to your brother. I'll help you out.” 4

“Thanks, Yi Chen. I didn't expect you to trust me right away when I told you this. Everyone else wants me expelled.” 7