Masaki Otori founded and presides over voice acting agency AiRBLUE. Her surname Otori (鳳) evokes a mythical male bird or phoenix, while her given name Masaki (真咲) blends "genuine" with "blossom," symbolically linking to themes of flight and growth. She stands 1.64 meters tall at age 34, with dark brown hair and blue eyes.

A former voice actress, she established AiRBLUE to cultivate new talent. She leads by granting trainees autonomy while strategically supporting them from behind the scenes, believing challenge fuels growth. This philosophy drove her to arrange auditions for all sixteen agency members for the same popular anime adaptation—a project attracting over 200 applicants from rival agencies for just four roles. She deliberately withheld that they competed against each other, asserting they needed to face the profession's inherent loneliness where individuals must ultimately rely on themselves.

She balances pragmatism with support. After a successful trainee stage performance, she hosted a celebratory party yet calmly announced the departure of their strict mentor, Kirika. She explained Kirika believed she had nothing left to teach them, stressing the trainees had progressed enough to grow through experience rather than instruction. While acknowledging Kirika as a long-time friend whose exit she respected, she affirmed their path forward remained open and urged them to keep striving.

Her interactions with staff like Rio Isuzu, who assists with trainee management, reveal her focus on creating member opportunities. She voices measured confidence in their potential—hoping at least one might succeed in fiercely competitive auditions while acknowledging the possibility of none advancing. Office discussions show her close observation of trainee progress, framing difficult challenges like the mass audition as "golden opportunities."