She is voiced by Mutsumi Tamura in Japanese Version, Leah Clark in English Version.
She is occasionally mistaken as a boy, due to her lack of feminine features, particularly her flat chest.
She is stoic and kind-hearted, she can get wild when drunk and has a particular fascination with maids.
When she is drunk, meet Tohru in her dragon form, Kobayashi had removed a holy sword from Tohru's back, earning her gratitude. With Tohru having no place to stay, Kobayashi offers to let the dragon stay at her home and become her personal maid, to which she agrees.
After that, she gets ready for work, she is greeted by a large dragon right outside her front door and the dragon introduces herself as Tohru.
- Her first name is unknown.
- Her Japanese Voice Actress, Mutsumi Tamura is best known voicing as Koshiro Izumi from Digimon Adventure tri..
- Her English Voice Actress, Leah Clark is best known voicing as Blair from Soul Eater, Minami Shimada from Baka and Test, Fuyuki Hinata from Sgt. Frog.