Kotori Otonashi is a long-serving office clerk and secretary at 765 Production, the talent agency at the heart of the story. She is the daughter of a former idol, Kotomi Otonashi, and grew up around the entertainment world, which deepened her own love of singing despite never pursuing an idol career herself. Her exact age is kept ambiguous, but she is described as being a little older than the agency’s Azusa, placing her somewhere in her twenties. She stands at 159 centimeters and carries a warm, approachable presence that makes her a familiar face in the agency’s daily operations.

Her personality is an unusual blend of competence and whimsy. She is open-minded, intelligent, and perceptive, traits that make her an effective supporting figure for both the idols and the production staff. At the same time, she has a shy side and a habit of retreating into vivid daydreams, especially when the office is quiet. Those daydreams can veer into outrageous or fanciful territory, and she has been known to indulge in a fujoshi-like fascination with certain pairings. In her downtime, she browses internet forums and has earned a playful reputation for having a slightly perverted streak because of the topics she gravitates toward. Despite this, she remains fundamentally kind-hearted and dependable.

Her primary motivation is to nurture the idols and help them shine. She does not perform on stage herself, yet her love of singing remains a quietly treasured part of who she is. She channels that passion into supporting the performers around her, and she takes genuine pride in seeing the agency thrive. There is also a more personal and gentle longing in her interactions with the Producer, for whom she harbors a small crush, occasionally hinting that she would like him to take her to dinner or for a drink.

Within the narrative of Million Live, Kotori serves as an indispensable behind-the-scenes pillar. She assists the rookie Producer with the 39 Project, helping to run the theater and coordinate the activities of the newly formed idol group. Her role extends beyond paperwork: she often announces in-game events, real-world character birthdays, seasonal meetings, and live concert segments, becoming the steady voice that guides both idols and audiences through the schedule. She appears across a wide range of drama tracks and event segments, reinforcing her status as the connective tissue of the production’s daily life.

Kotori’s key relationships revolve around the staff and idols of 765 Production. She shares a close working partnership with the Producer, acting as a calm, knowledgeable counterpart who tempers his inexperience with her veteran insight. With the idols, she is a gentle and encouraging presence, never seeking the spotlight but always ready to offer a listening ear or practical help. Her bond with the agency as a whole is familial; having grown up around the industry thanks to her mother, she treats 765 Production as an extension of her own home and its members as a kind of extended family.

Her development across the series is subtle rather than dramatic. She begins as the reliable office worker who knows the ins and outs of the agency, and over time she reveals more layers of her playful imagination, her unfulfilled longing to sing, and her quiet emotional investment in the Producer. While she never undergoes a drastic transformation, the accumulation of small moments with the idols and staff deepens the audience’s understanding of her as someone who is at once a competent professional, a daydreaming romantic, and a steadfast supporter of everyone she works with.

Among her notable abilities are her exceptional organizational skills, her talent for clear and personable live-event announcing, and her surprisingly strong singing voice, which surfaces on rare occasions and hints at the performer she might have been had her path been different. Her real strength, however, lies in her emotional intelligence and her unwavering reliability, qualities that make her an irreplaceable part of the 765 Production family.