Lin Otsuki (Ōtsuki Rin) was a member of the legendary idol duo AneLa under Groovy Production Agency. A career-ending injury, decided jointly with his partner Maoto Tsujido, led to his retirement from active idol work. Together, they subsequently founded the talent agency sMiLea Production to train and nurture new generations of idols. His background as a child actor contributes to his high professionalism and industrious work ethic, evident in his meticulous mentoring and agency management. He balances an approachable personality with strictness. He demonstrates genuine care and support for sMiLea's idols, offering advice and assistance readily. However, he maintains a disciplined and demanding approach during coaching, emphasizing rigorous training standards. His friendly nature extends to helping others in challenging situations, including assisting members of Sora's team facing danger. Physically, he possesses blue eyes and gray or blue hair reaching his ears. He is 25 years old as of the covered timeline. His birthday is March 30, making his zodiac sign Aries, and his blood type is A. His given name Lin means "dignified, severe, cold," while his surname Otsuki translates to "big moon."