Reiko is an alluring woman who wants to capitalize on her natural sex appeal. She is heavily based on actress and model Chiaki Takahashi, who voices Azusa Miura. They have the same family name, birthdate, blood type, and hometown, and share both similar physical attributes and personality. She is part of a unit named Red Ballad, along with Ai Togo, Aya Kirino, Chiaki Kurokawa, and Chinatsu Aikawa. In her commus, Reiko is at a party when she meets the producer. She introduces herself, saying she's at events like this quite commonly. After talking for a bit, Reiko shows interest in being produced, despite being older. She's very flirty, and a lot of her dialogue is clearly innuendo. She tends to tease the producer quite a bit. Although she's very calm and collected, Reiko gets emotional after spending a day with a kitten, then having to leave it. Shino Hiiragi and Reiko have an agreement on taking care of the other when they're too drunk, and Reiko mentions she enjoys bar-hopping. She's very in tune with her sexuality and isn't afraid to show off at all. In the tie in Cinderella Girls Theater skits, Reiko seems to have her eyes on the Producer and his whereabouts. It is apparent that she has great insight on the personalities of other idols. Mayu Sakuma teases her about her age.