Kanna Kamui

Kanna Kamui (カンナカムイ ) is a young female dragon, who was temporarily exiled from her world as consequence of her pranks.

Appearance
Kanna has white-lavender hair and blue eyes. Her style of clothing has been described as "gothic lolita with a tribal theme" (courtesy of Kobayashi). Her usual attire consists of a white capelet with a fur collar, a pink blouse, a white frilly skirt and pink doll shoes. She ties her hair into pigtails, each adorned with three dark blue beads.

Like Tohru, she wears her horns and tail out whenever she's indoors.

Background
As punishment for her pranks, she is temporarily exiled to the modern world to reflect on her actions. Once she learns that Tohru survived her last battle with a god and is currently living in the modern world, she searches for her in hopes of returning with her to their world.

However, when Tohru refuses to return, Kanna accuses Kobayashi of seducing Tohru. But seeing as Kanna has nowhere else to go, Kobayashi then offers the young dragon to stay with her.

Later in the series, after Kanna shows interest in attending a human school, Kobayashi enrols her in Oborozuka Elementary and accompanies her along with Tohru to shop for school supplies.

Kanna develops a familial relationship with the two while living with them.

Tohru
Kanna respectfully refers to the older dragon as Lady Tohru or Tohru-sama. Tohru claims that Kanna is an old acquaintance of hers, and it has been implied that the two would often play or bathe together back in their world. After Kobayashi offers Kanna to stay with her, Tohru takes up the task of personally teaching her about the modern world. In later episodes, Kanna looks to Tohru as an older sibling.

Kobayashi
Though initially distrustful towards Kobayashi, Kanna quickly grows attached to her. She is often seen clinging to Kobayashi, holding the woman's hand and hugging her at the waist. Kanna openly yearns for Kobayashi's attention and makes it known that Kobayashi is like a mother to her.

Saikawa Riko
Riko is Kanna's human friend and classmate. They spend plenty of time together outside of school and would often pick each other for partners during school activities. The first time Kanna was invited to Riko's house to play, Kanna declares that she wishes to pursue a similar relationship to Tohru and Kobayashi's with Riko, hinting at a possible romantic affection towards the human girl.