Once a dying abandoned kitten, the character was granted vampiric immortality when a wandering vampire saved it with a blood transfusion. This transformation bestowed bat-like wings, sunlight immunity, and a yellow cross-shaped mark on its stomach—unaffected by the symbol’s typical vampire weaknesses. Now residing with human owner Misaki, it navigates domesticity while hunting for blood or crimson substitutes like tomato ketchup and blood orange juice. Daily life intertwines with anthropomorphic cats and bats, including samurai cat Masamunya, whose unrequited romantic feelings spark jealousy after a wound-licking encounter, and Nyatenshi, a serene yet mischievous fallen angel cat whose detached mockery fuels tension.

Exuding childlike curiosity and occasional forgetfulness of its vampiric powers, the character grapples with existential fears of outliving mortal companions. Its black-furred form, marked by prominent fangs and fixed wings, parodies classic vampire tropes—visual nods include Dracula-inspired coffin scenes. Life unfolds through mundane and supernatural blend: adapting to new housemates, reveling in festivals, and hijinks-filled Halloweens where costumes highlight its dual nature.

Relationships anchor its world—Misaki embodies found family, while complex ties to Masamunya and Nyatenshi weave romantic ambiguity and comedic rivalry. Without conventional villains, conflicts arise from lighthearted misunderstandings or communal antics, resolved through teamwork or whimsy. The narrative thrives on slice-of-life humor, balancing immortality’s weight with playful, everyday escapades.