Translated as "Snake Flower," Ja-Ka (神魔・蛇華?) is a Shinma with a long snake tail instead of legs. She gets power from the snakes that attacked people in the swamp and even launch them as an attack. A guardian spirit in the swamp who took the shape of a boy was protecting the seal that kept her imprisoned for ages until Miyu interfered. Reiha also wanted to destroy the boy-spirit, judging he was a Shinma, but on a second thought she found better not to provoke Miyu this time.

When Ja-Ka was freed, she unleashed her snakes on the boy until Miyu burned them. Ja-Ka constricted Miyu and the boy with her tail until Larva saved them and Ja-Ka was returned to "The Darkness" by Miyu.

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  • She is probably inspired in the Buddhist myth of Naga, a race of supernatural beings who can shape shift between a human and a snake or are half-human half-snake.