Motoki Furuhata is a young man who works part-time at the Game Center Crown, a video arcade, while attending K.O. University. He is a tall individual with blond hair, green eyes, and a medium skin tone, commonly seen in his work uniform of a dress shirt, dark pants, and an apron. He has a younger sister named Unazuki and a pet turtle named Kamekichi.

His personality is friendly, kind, and cheerful. He is known for his helpful and supportive nature, often looking out for the main characters. He is shown to be responsible and hardworking. His motivations appear grounded in a desire to help others and maintain a peaceful life; he takes pride in the arcade as a gathering place for friends.

In the story of Pretty Guardian Sailor Moon Crystal, Motoki serves as a recurring civilian character who provides a normal counterpoint to the magical adventures of the Sailor Guardians. The arcade functions as a meeting spot for Usagi and her friends, and Motoki is a friendly face there. Usagi has a crush on him early in the series and refers to him as Motoki-oniisan. He is also a friend of Mamoru Chiba, who attends the same university. In Crystal, Motoki does not discover the secret identities of the Sailor Guardians, remaining unaware of their battles.

His key relationships include his close friendship with Mamoru Chiba, his admiration from Usagi Tsukino, and his romantic relationship with Reika Nishimura, a dedicated science student. He interacts regularly with the Sailor Guardians in their civilian forms.

Motoki undergoes little personal development over the course of the series. He remains a consistent source of normalcy, emotional support, and occasional comic relief. He has no supernatural abilities; his strengths lie in his interpersonal skills and reliability as both a friend and worker.