Tomoka Inose is a waitress at Inoya cafe. She attended Yomiyama North Middle School during 1983.
She is shown as a mature and responsible person but also a good and kind half-sister.
Tomoka has long brown hair, usually caught in a neglected pony tail, and green eyes. She wears a white shirt with a black tie and a red vest and a black skirt, presumably the cafe's uniform. In the manga, she has white long hair tied in a ponytail and black eyes. As casual clothes she wears a white T-shirt. The cafe's uniform consists of a white shirt with a black vest.
Tomoka made her debut in episode 7 as a waitress at Inoya Cafe. It is revealed that she is Yūya's older half-sister. She attended Yomiyama North Middle School during 1983. Although aware of the rumours about class 3-3, Tomoka didn't believe them until her brother who was fearing for his life, explained the situation to her. Katsumi Matsunaga is a regular customer at the cafe where she works. Tomoka helps Kouichi, Yuuya, Naoya and Izumi to solve the mystery of the 9th grade class 3 and stop the calamity, giving them details from her conversations with Katsumi, the one who stopped the calamity.
- Her first name, Tomoka, means caramel delight.
- Tomoka's husband owns the Inose Cafe, which is where its name comes from.
- In the original novel, the group doesn't meet Katsumi face-to-face, but learn about the object in the old 3-3 classroom through talking to Tomoka. Her role is also more significant in the manga, as she gives the group information about the curse, not Katsumi.
- She and Kazue Satou are first equal in being the tallest female characters in the series with a height of 168cm.