Chomusuke resembles a black feline with bat-like wings, a crimson cross marking on her forehead, stubby legs, a rounded head, and yellow oval eyes. Introduced as Megumin’s familiar, she is later revealed as the fragmented half of the Dark God Wolbach. Stripped of aggression after her power was absorbed by Wolbach, she retains sharp intelligence, comprehends human speech, and solves problems like cooking with fire breath. She gravitates toward individuals embodying sloth or aggression, such as Kazuma’s lethargy or Megumin’s explosive zeal. While affectionately kneading Wiz’s bust, she reacts hostilely to Aqua, their clashing auras fueling mutual disdain. Post-merger with Wolbach, Chomusuke adopts traits like savoring biscuits and indulging in hot baths, occasionally acknowledging her dual identity by responding to "Wolbach." In crossover narratives, her abilities span fire breath—refined under Cecily’s guidance—and flight via her wings. A running gag features characters dismissing her supernatural acts as mundane cat behavior, with Megumin adamantly labeling her "ordinary" despite contradictions. This dynamic shifts in crossovers, where Subaru voices skepticism about her quirks. During *Another World* events, Chomusuke arrives in a parallel dimension alongside Ainz Ooal Gown, separated from her companions. She aids skirmishes against rogue golems, though her impact on resolving the crisis remains minimal. Her presence highlights her role as a familiar with latent mystical ties, especially in realms plagued by interdimensional instability. Her origins anchor her within Crimson Magic Clan lore, linked to the inventor of the Destroyer and Crimson Demons. This connection weaves her into broader mythological undercurrents, occasionally surfacing in crossovers to hint at deeper narrative threads beyond her comedic facade.