Mikoto Shiratori is a former badminton prodigy recognized for his sharp observational skills and foresight during matches. A traumatic high school incident at the Inter-High tournament, where a collision with his doubles partner Azuma Tachibana caused Azuma's career-ending knee injury, deeply affected him. Mikoto never visited Azuma in the hospital, fueling deep-seated guilt and emotional scars that led him to permanently avoid doubles play.

He initially played badminton for Mitsuhoshi Banking's corporate team while employed there, but was fired after losing a critical match because his unresolved trauma impaired his performance. Mikoto then joined Sunlight Beverage as a sales department employee and team member. At Sunlight, his colleague Tatsuru Miyazumi encouraged him to become his doubles partner, forcing Mikoto to confront his past and gradually work through his psychological barriers regarding teamwork and doubles competition.

Mikoto possesses a distinctive palate, favoring spicy foods and unconventional combinations like Sunlight Beverage's "Natto Cola," and is characterized as a big eater. His physical attributes include petrol-colored hair, brown eyes, a birthdate of May 11, an age of 19, and a blood type of AB.

His development centers on reconciling his traumatic past with his present role, learning to trust a partner again, and rebuilding his confidence in competitive corporate badminton.