She is voiced by Mika Kanai in the Japanese version and by Meredith McCoy in the English dub.
Kotei joined the tournament on a dare when her friends joined, but she was the only one to pass the preliminaries. When Kotei first introduces herself Rinku, he falls in love with her. During the tournament, she defeats the lovestruck Rinku, causing Touya to consider him a hypocrite for criticizing a lovestruck Chu forfeiting Natsume. It is unknown how far she lasted, but she didn't last past round 3 of her D Block at most. For the rest of the saga, she is seen hanging out with Rinku.
In the manga-only epilogue, where Chu is training with Natsume, both her and Rinku can be seen watching them on a nearby cliff face. Both Rinku and she state that Chu should stop chasing after Natsume.
- Kotei is likely an A+ or S- class demon.
- It is speculated that she was eventually stymied by Mukuro in the third round of the tournament, before the latter fought Natsume.