23-year-old Kirk is the boyfriend of the Halloween-loving bat Jacqueline. The two met when Jacqueline was at a Halloween party, where she met the moth. It turned out the two had a lot in common, especially the fact that the both of them had Halloween as their favorite holiday, and as such, they became friends with each other. The two are seen together most of the time, their favorite thing to do being during the Halloween season where they go to Halloween-themed parties and other related festivities, and maybe see a scary movie together. When Kirk isn't with Jacqueline and has spare time, he usually spends it watching horror movies and reading similar books.