Jashin-chan is a self-centered lamia who was summoned from Hell by Yurine. She possesses regenerative abilities, which allows her to recover from whatever bloody punishment Yurine inflicts. Although it seems that Jashin is an absolutely immoral girl who manipulates Medusa or mocks Pekola without any regrets, at heart she is capable of good deeds and appreciates her close friends. However, as Yurine notes, Jashin is embarrassed by this and tries to hide the good traits of her personality because of her tsundere nature.
(Source: Wikipedia)