Kotoha (コトハ, Kotoha) is one of the main characters in the series and a Unemezoku. Like all the other females in the Unemezoku family, she can use her healing ability to heal people in Arata's group.
Kotoha has light purple hair and light purple colored eyes.
Kotoha is overly bubbly and wishes to help others. She is a magic user and likes to use her abilities to treat injured teammates. Kotoha is the type to put others before herself and will endure physical harm trying to save someone. Kotoha has been in love with her friend Arata since childhood. However, her feelings are starting to shift towards Hinohara who reciprocates her affections. Kotoha doesn't like for others to belittle themselves as she believes everyone is special in their own way.
Kotoha's past remains a mystery. Her parents was mention in the first chapter, but it unknown what happen to them; therefore Kotoha's flashback is only viewed through Arata. She and Arata have been together since childhood and they were both born on the same day.
Healing: As an Unemezoku, Kotoha has the power heal anyone of their injuries. The setbacks are: she isn't that strong at it and she can't heal herself. However, after she gained a shard from Saruta's Tadikara, Kotoha's healing powers have become stronger. Having been severely wounded from Hinohara's demon rampage and unable to heal herself, another dying Unemezoku offers her remaining life to cure Kotoha, and receives her Uneme mark strengthening Kotoha's power further more.
- Arata: Kotoha's crush. Kotoha and Arata have known each other since childhood. The two have grown up to be treated as siblings which irritates Kotoha. Arata is unaware of her affection but still considers her someone that is important and needs to be protects. At some point, Kotoha got the chance to speak to Arata, although he claims that Kotoha is a sister figure to him.
- Arata Hinohara: Kotoha isn't aware that Hinohara is a different person until noticing his reactions to her. Hinohara is shy, whereas Arata is oblivious. Kotoha works to make Hinohara treasure himself more when he first comes over from Japan. Throughout the story, she begins to develop feelings for him, especially after Arata rejected her. Seeing him as more than an ally and friend; it is shown that Hinohara has feelings for her.
- In the manga, Kotoha kissed Arata Hinohara unaware that her first isn't with Arata beforehand.
- Kotoha was so convinced that Hinohara is Arata without any memory, until she heard him mention a father, mother, and sister, since her Arata has no other relatives.