Birthday: November 8
Birthplace: Tokyo
Height: 166cm
Weight: 48kg
Blood type: B type
Three sizes: B90/W60/H91

She is the childhood friend of Kazama. Secretly, she has a one-sided love for him. She is aware that Kazama has a terminal illness and wants him to take the life-threatening surgery that would save his life. However, she hates Eba because of their relationship and of Eba's quiet apprehensiveness towards the surgery. With the help of Haruto, Kiyomi attempts to confess to Kazama numerous times with no avail, only to blurt it out awkwardly at his pre-surgery good-luck party in chapter 99.

Kiyomi goes to Seijo University with Haruto, Asuka, Nanami, Takashi and Akari. She and Takashi are now dating. Her relationship with Takashi went slowly, given their different personalities, until they finally made love.

When Kiyomi found out that she was three months pregnant, she told Yuzuki about her pregnancy herself, and openly stated that she loves Takashi and wants to give birth to his child.