Meltina Melvis imparts chemical knowledge and home economics instruction at the Sefiro Fiore Nagataki Branch, an organization dedicated to combating Daemonia. As senior staff, she wields the power of the Magician tarot card, her weapon manifesting as a jack-o'-lantern artifact in battle against these entities.

She possesses long pink hair and lilac or purple eyes, typically attired in a black dress, black long gloves, and distinctive blue and pink bracelets. Meltina exhibits a sweet, generous, and mature personality, maintaining a notably relaxed and easygoing approach both in the classroom and during combat engagements. This demeanor provides a distinct contrast to her close associate and fighting partner, Priscilla Twilight, known for her stricter disposition.

Beyond teaching, Meltina actively takes to the field on missions against Daemonia alongside Priscilla. She demonstrates a particular enthusiasm for explosive reactions within her chemistry work. Her birthdate is February 14th, under the Aquarius zodiac sign, with blood type O.