"I'm sorry. It's just that I really like this kind of things."

- Ryōko Akiyama

Ryōko Akiyama (秋山 涼子, Akiyama Ryōko) was a Yomiyama North Middle School student in 3-3 Class of 1983, along with Reiko Mikami (Ryōko's best friend) and Katsumi Matsunaga. She appears exclusively in the manga and never appears in the anime, but she was never mentioned.

Ryōko has short, straight black hair and black eyes.

She wears the Yomiyama's North Middle School female standard uniform.

Ryōko seems to be a superficial and ironic girl. She claimed that she likes "that kind of thing", referring to the class curse. Also, she gathered information about the curse and the calamity from ex-students from Class 3-3 and researched it and believes it, claiming that "a lot of students have died", even if she isn't affected by it. She is a joker person as she likes to scare Reiko Mikami with the curse.

Ryōko appears in Another 0 manga. On the first page, she woke Reiko up from her sleep at school. Also, Ryōko is usually seen with Reiko at school, talking with her about the curse. Ryōko had insisted the curse was real, warning Reiko to be careful, before heading home, telling her she'd see her tomorrow.

Ryōko died at the end of Chapter 1 (Another 0) after being hit by a car while returning home from school, because of the 9th-grade Class 3-c curse; as the first to die, this was the sign the curse had started.

When Reiko found out about her death, she was devastated and couldn't believe that her friend was gone. At her funeral, Reiko said that Ryōko was her best friend since 1st year.