*Name: Bitter Alkali
*Age: 17
*Preference: Seme

*Biography: Born as an Alkaline Demon, Bitter made friends with the child of the Acidic Demon clan, Sour. He had been destined to be with him ever since they were little. Mainly because Sour's the only one who doesn't get hurt when they touched. In a love-hate relationship, Sour is his only friend and later, lover and wife.

*Personality: Mischievous, pokerface and a bit sadist, Bitter harbours deep feelings to Sour, only to cover it when he's about to tell him what he really feel. He wished to be Sour's true love just like in the fairy tale. He didn't mind others hating him as long as it's not Sour.