Hoshinomiya

Biodata

Feature	Information
Name	Hoshinomiya Rinyu (星之宫) 1
Gender	Male 1
Affiliation	Class 1-A, Advanced Nurturing High School 1
Occupation/Role	Student; information broker and intermittent investigator 3 10
Status	Active 10
First Appearance	Chapter 1

Background

Rinyu awakens on the bus to Advanced Nurturing High School and realizes that he has transmigrated into the world of Classroom of the Elite. He immediately recognizes several students—including Ayanokoji Kiyotaka, Horikita Suzune, Kushida Kikyo, and Koenji Rokusuke—while concealing his unusual prior knowledge. 1

After being assigned to Class 1-A, he identifies its two emerging power centers around Sayanagi Arisu and Katsuragi Kohei. He takes the seat beside Arisu and quickly questions Mashima Tomoya about whether the school’s monthly point distribution can fluctuate, exposing the existence of hidden conditions behind the system. 1

Rinyu later recalls dreaming about his grandfather. During a period of fever and exhaustion, he is also troubled by an unexplained feeling that something is missing from his memory. 2 7

Personality

Rinyu is outwardly composed, polite, and difficult to read. He is willing to perform socially expected acts—such as offering his seat to an elderly passenger—but openly accepts that self-interest and avoiding trouble may motivate him. 1

He often appears detached from tensions around him. He sleeps through Sayanagi and Katsuragi’s first major disagreement, then responds to the resulting embarrassment without anger or visible shame. 2 His calmness in the face of the school’s harsh rules and volatile confrontations makes him stand out to Arisu and other students. 4 6

Behind this relaxed demeanor, Rinyu is opportunistic and transactional. He treats knowledge, evidence, and private points as resources to be exchanged for leverage or profit. However, he is not wholly indifferent to others: he organizes academic support for Class A and lends points to help Class D prevent Sudo’s expulsion. 5 6 7

Abilities & Skills

Observation and Information Analysis

Rinyu studies students’ behavior, identifies concealed talent, and notices details others may overlook.

• Recognized Ayanokoji’s restrained movements and watchful eyes during the entrance ceremony. 3
• Deduced the point system’s hidden conditions before Mashima explained the monthly class-point results. 1
• Identified Sakura Airi’s unusually panicked avoidance as a potential lead in the Sudo incident, while avoiding an unsupported accusation. 10
• Uses his prior knowledge of the school’s world while presenting himself as an ordinary newcomer. 3

Academic Ability

Rinyu is one of Class A’s strongest academic performers and uses that ability to support other students.

• Scored perfectly in four subjects and was the only Class A student with full marks overall; only Japanese prevented a completely perfect result. 5
• Proposed a class-wide study group in response to the threat of expulsion for failing a single midterm subject. 5
• Earned respect from classmates by tutoring them during the study sessions. 8

Physical Ability and Combat

After transmigrating, Rinyu discovers that his body possesses dramatically enhanced stamina, endurance, and explosive power compared with his former self. 3

• Runs without fatigue through routes that previously would have left him exhausted. 3
• Avoids Kushida’s attempt to grab him with a movement fast enough to make him seem to vanish from her view. 6
• Deflects Horikita Manabu’s kick and moves behind him before Manabu can respond, placing a hand strike at his neck. 6
• His exact physical limits and the source of his altered body remain unexplained. 3 6

Negotiation and Resource Management

Rinyu frequently converts information or leverage into points, favors, and strategic access.

• Offered Class B information about personal points and future class trends for 500,000 points, delaying payment because he trusted Ichinose Honami’s reputation. 3
• Established an intelligence arrangement with Kushida: she gathers Class D information in exchange for monthly points and access to exam-related intelligence. 6
• Recorded Horikita Manabu’s confrontation with Suzune, then exchanged deletion of the footage and backup for two million points. 6
• Lent 200,000 points to support Sudo’s effort to avoid expulsion after Horikita approached him. 7

Coffee Preparation

Rinyu owns a semi-automatic coffee machine and is capable of making lattes and latte art. 3 4

• Bought the machine for 20,000 private points shortly after arriving at school. 3
• Prepares drinks for Arisu, including a latte during her visit to his dormitory. 4

Equipment / Items

• Student terminal — Used for point transfers, contact exchanges, negotiations, and recording Manabu’s confrontation with Suzune. 3 6
• Semi-automatic coffee machine — Purchased for 20,000 points for his dormitory. 3
• Hidden collar device — A small device with a blinking red light, apparently used for tracking or surveillance; Rinyu disables it in private. 3

Relationships

• Sayanagi Arisu — Seatmates and close Class A associates. Their dynamic combines mutual probing, strategic interest, teasing, and growing affection; they agree to play chess in the future. Arisu tends to Rinyu during his fever and arranges two days of leave for him. 1 4 7 8
• Kushida Kikyo — Rinyu discovers her hostile private persona and turns the secret into a paid intelligence arrangement. Despite their coercive business relationship, Kushida later asks him to help investigate Sudo’s case. 6 9
• Ayanokoji Kiyotaka — Rinyu recognizes Ayanokoji’s hidden perceptiveness early on. They later cooperate indirectly in the investigation of the Class C–D conflict, with Ayanokoji observing Rinyu’s motives and capabilities. 3 9 10
• Horikita Suzune — Their first exchange leaves Suzune suspicious of him. Rinyu later witnesses Manabu’s confrontation with her, profits from the recording, and lends points through her arrangement to help Sudo. 1 6 7
• Horikita Manabu — Manabu pays Rinyu two million points to delete footage of his confrontation with Suzune after Rinyu demonstrates superior combat speed. Manabu subsequently asks Rinyu to look after Suzune in his absence. 6
• Ichinose Honami — Potential business partner and buyer of Rinyu’s school information. He trusts her integrity enough to postpone her class’s 500,000-point payment. 3
• Hashimoto Masayoshi — Classmate who helps Rinyu shop for dormitory supplies and later observes his increasingly intimate interactions with Arisu. 3 4
• Kamuro Masumi — Member of Arisu’s circle who assists in caring for Rinyu during his illness and bluntly exposes Arisu’s concern for him. 4 8
• Sudo Ken — Rinyu lends points toward Sudo’s expulsion crisis and later investigates possible Class A witnesses for Sudo’s fight case. 7 9 10
• Koenji Rokusuke — Their first meeting begins with Koenji mocking Rinyu’s decision to offer his bus seat, then becoming curious when Rinyu reveals that he knows him. 1

Story Role / Major Arcs

Arrival at Advanced Nurturing High School

Rinyu enters Class 1-A, identifies its internal factions, becomes Arisu’s seatmate, and immediately investigates the school’s suspiciously generous point system. 1

Establishing Himself in Class A

His unexpected classroom nap breaks the tension between Arisu and Katsuragi, while his interactions with Arisu become increasingly familiar. He evaluates prominent first-year students, purchases dormitory supplies, and begins selling valuable school information to Class B. 2 3

Point-System Revelation and Class Leadership

After the class rankings expose the school’s hierarchy, Rinyu remains composed while others react with shock. When the midterm’s expulsion condition is announced, he organizes a study group to keep every Class A student above the failing line. 4 5

Intelligence Deals and the Manabu Recording

Rinyu leverages Kushida’s concealed personality into an intelligence partnership. Later, he records Manabu’s confrontation with Suzune, defeats Manabu in a brief exchange, and secures two million points in return for deleting the footage. 6

Support for Class D

Although he portrays his assistance as practical rather than charitable, Rinyu lends 200,000 points during Sudo’s first expulsion crisis. He later agrees to search Class A for witnesses in the Class C–D fight case. 7 9

Sudo Incident Investigation

After Class A provides no witnesses, Rinyu shares his observation of Sakura’s abnormal reaction with Kushida, Ayanokoji, and Suzune. He leaves the next step—approaching Sakura directly—to them. 10

Trivia

• Rinyu gives a sleepy self-introduction claiming that he is from Nagoya and enjoys reading. 2
• Morishita Ai wakes him during the Class A self-introduction dispute by throwing an eraser pellet at him. 2
• He calls Sayanagi by the nickname “Alice,” after which she begins addressing him as “Rinyu-kun.” 3
• During his fever, he accidentally calls Arisu “Mom,” embarrassing himself and delighting her. 8