|Race||Youkai and Human|
|Age||Debut:15 Current:20 (Reincarnation)|
|Eye Color||Light Brown|
|Manga Debut||Chapter 1|
|Anime Debut||Episode 1|
|Japanese Voice||Kana Hanazawa|
|English Voice||Monica Rial|
Karuta Roromiya (髏々宮カルタ Roromiya Karuta) is the SS for Kagerou Shoukiin, she usually seems phased out but is actually very clever and well knowing about important details. Her Youkai power is that she can tranform to a Gashadokuro (Large skeleton).
She was completely taken over by the enemy and was forced to be killed sometime after enemy Youkai raid. She has been reincarnated, and is currently 20-years old. She now has short hair, and her breasts are bigger than in her previous life.
Karuta is a slim teenage girl with bubblegum pink hair and matching pink eyes. She puts her hair into two high side pigtails and her hair is also wavy. While she is a SS, she wears a black female suit with a white shirt and blue tie. When she is at school she wears her uniform which is similar to Ririchiyo Shirakiin's.
After her reincarnation, Karuta has short hair and has bigger breasts than in her previous life.
Her youkai form is Gashadokuro which is a large skeleton. She sometimes has violet mist surrounding her when she is in her youkai form.
Gashadokuro are believed to be created by gathering the bones of people who have died of starvation. Could be a hint to why she eats so much.
Karuta appears to be a very simple-minded girl who loves eating to a degree that is almost obsession. Karuta also won't stop at nothing when she sees someone or something in need of her help, such as a cat that she rescued during gym. Like Ririchiyo, she has trouble making friends (although it doesn't bother her that much) because of her simple-minded ways. Despite this, she manages to become close friends with Ririchiyo and rekindles her friendship with Watanuki when he returns from his training.
After her reincarnation, she looks more cheerful and carefree.
Watanuki has been friends with Karuta ever since they were little. Watanuki has a big crush on Karuta, but Karuta seems to not realize it, though she does reciprocate with intimate gestures and small hints (which causes Watanuki to blush). Karuta does shows true care and concern for Watanuki, such as when he got into a fight (with students that were calling Karuta weird) and afterwards she visited him to the nurse office to confirm that he wasn't hurt. She missed him very much when he was out training and was really happy when Watanuki came back. They make a good team when they were partners against Nobara and Renshou and Ririchiyo and Soushi during the competitions. He always tries to help her in anyway he can, and Karuta appreciates him for it.
She became friends with Ririchiyo after Ririchiyo offered her some food while Karuta was hungry, since she had eaten her lunch in the middle of class. She seems to genuinely care about Ririchiyo (similarly to how she cares for Watanuki), which in turn is reciprocated by Ririchiyo, as shown when Karuta didn't go to school in Episode 10.
Kagerou was Karuta's master in part one. He treated Karuta like a pet, as he likes tying her like a dog due to his sadistic personality. Karuta doesn't seem to mind at all, as long as she is given something to eat.
Near the end of Part 1, she was attacked and possessed by enemy youkai who began to use her for their own purposes. She asked Watanuki to kill her, as she could never return to human form. Watanuki yelled to her and told her that he would still be by her side, no matter if she couldn't return to human form. Although she was so happy to hear these sentiments, she was completely taken over by the enemy and was forced to be killed sometime after the raid.
In Part 2, she has been reincarnated, and is currently 20-years old. She now has short hair, and her breasts are bigger than in her previous life.
In part 3, all of the residents got a letter from their reincarnated selves, saying what will happen in the future if they don't stop the attack. All characters are current the same ages as before.
- Her hobby is eating, especially pocky and parfaits, and drinking Guaraná (a sweet drink).