Kawai is Nagisa's best friend and coworker. She works with Nagisa part-time at a fast-food delivery service, and is nearly killed by Fiber when Neos' forces attack the moonbase. She later becomes a member of the Queen Fuji crew along with Nagisa and Iczer-3. Kawai is a tender-hearted person, but she is deathly afraid of insects. She also worries for the safety of her parents, who live on Earth.