Komori-kun is one of a pair of bats linked to the vampire responsible for transforming the abandoned kitten protagonist into a vampire cat. He appears alongside his companion, Mori-kun, in the anime series. Their background connects them directly to this original vampire figure who saved the kitten by giving him blood. Komori-kun and Mori-kun function primarily as a duo within the narrative, often embodying the "Those Two Guys" trope, and their interactions focus on the main cast of cats. They first meet the protagonist in episode 7. During the Halloween-themed episode 11, Komori-kun and Mori-kun participate by dressing in costumes, specifically cross-dressing as female characters. Their role remains consistent as supporting characters tied to the series' vampire lore, with no expanded background or significant development detailed beyond their introduction and the Halloween episode. Information regarding appearances in other media formats is not provided.