Kyōichi Teshigawara, widely known by the nickname Tessy, serves as the dedicated manager of the idol group Shōnen Hollywood and the assistant to its founder, Tsuyoto Hiiragi. He has been intrinsically linked to the theater Hollywood Tokyo since before the formation of the original Shōnen Hollywood, making him an indispensable and long-standing figure within the organization. His deep affection for all the group members is evident in his actions; he consistently prioritizes their needs and well-being above all else, and he works tirelessly to support their practice and daily activities.

Tessy possesses a calm and collected exterior that can sometimes be mistaken for indifference, but in truth he is a profoundly caring and loyal individual. He is known for his unwavering commitment and his ability to remain steady and focused regardless of the situation. He approaches every task with full effort and a clear sense of purpose, never wavering in his support of the group or the theater’s president. The members affectionately call him Tessy, relying on him for guidance and care while also playfully teasing him; he accepts all of this with patience and warmth, demonstrating an openness and a generous spirit that endears him to everyone around him.

His role in the story is primarily that of a behind‑the‑scenes supporter and manager. He ensures the group’s operations run smoothly, provides practical assistance during rehearsals, and helps maintain a stable environment where the boys can focus on their growth as idols. While he does not perform on stage himself, his leadership and organizational skills are crucial to the group’s cohesion and success. Tessy is deeply motivated by a genuine desire to see each member flourish, and his dedication is a steadying force within the often‑demanding idol industry.

Key relationships include his close working partnership with Tsuyoto Hiiragi, the president of the agency, as well as his nurturing bond with each of the five current Shōnen Hollywood members. He is someone they trust implicitly, and he in turn respects their individual talents and struggles. Over the course of the series, Tessy’s character remains a pillar of consistency, with his development manifesting not in dramatic personal change but in the deepening of his commitment and the subtle ways he learns to better support the group. His notable abilities include exceptional management skills, a calm and decisive leadership style, and an almost inexhaustible patience that enables him to handle the challenges of guiding a young idol group with both competence and kindness.