Tsuneo Suzukawa is a university student studying marine biology who works part-time at a diving shop to support himself. Tall and slim, he has medium-length straight black hair and light green eyes. Fundamentally hardworking, intelligent, and humble, he possesses a deep-rooted childhood passion for the ocean. His primary dream is to dive in Mexico and observe a wild clarion angelfish, his favorite fish. While intensely focused on this goal, he displays natural kindness and patience, especially when assisting Josee despite limited personal gain. He tolerates her initially difficult behavior, though sometimes reacts with blunt annoyance. His loyalty and protective instincts strongly emerge in his relationship with Josee. After rescuing her during a wheelchair accident, he becomes her caretaker at her grandmother's invitation. He consistently encourages her to explore life beyond her confined existence, facilitating trips to the beach and supporting her artistic pursuits. His commitment deepens after her grandmother’s death, providing emotional support during her grief and transition toward independence. A key aspect of his development involves temporarily sacrificing his dream. He secures a scholarship to study in Mexico but initially conceals it from Josee. Later, after suffering a leg fracture in a car accident while aiding her, he abandons the opportunity entirely during his hospitalization, believing his dream lost. However, Josee’s creation of an allegorical storybook about their relationship renews his determination. Through rigorous rehabilitation, he regains mobility and ultimately reconciles his ambitions with their bond, traveling to Mexico while maintaining their relationship upon his return. Analyses suggest traits associated with ISTJ (introverted, sensing, thinking, judging), reflecting his reserved demeanor, methodical decision-making, and preference for structure. He also exhibits characteristics of Enneagram Type 6 ("The Loyalist"), emphasizing his need for security, dependability, anxiety about future risks, and profound loyalty to those he cares about. His background involves modest circumstances, necessitating part-time work to fund his education and ambitions. He maintains friendships with individuals like Hayato Matsūra and Mai Ninomiya, though these relationships occasionally introduce complexities, such as Mai’s romantic interest creating tension with Josee. His interactions with Josee catalyze significant personal growth, shifting him from a self-directed student to someone capable of profound empathy and enduring commitment.