Kurumi is the childhood friend of Ken in Pretty Rhythm Dear My Future. She had worked at his restaurant until she became fed up with quarreling with him. Kurumi had hidden her feelings of being in love with Ken and is very stubborn. However, when Ken proposed to her, she also became honest and accepted, giving him her hand in marriage. They are now engaged and work at the restaurant together once more.
- Kurumi's name is the Japanese word for walnut.
Kurumi's voice actress Ryoka Yuzuki also voices Poemu Ayase in Pretty Rhythm Rainbow Live. In addition, the voice actress for young Kurumi, Rumi Ookubo, also voices Mia Ageha in Pretty Rhythm Dear My Future.