Kasumi and Honoka's mother. She can be very optimistic and at the same time very pessimistic. She can't handle pressure and harsh words from others. She was once scolded by Kasumi and went into her cycle of depression.

Komachi is also friends with Kazane. They've known each other ever since high school and they were said to be so close that they could marry each other. However, they couldn't because both of them are women and so they promise each other that they would let their children do the marrying for them.