CiON is a Japanese artist associated with anime music. CiON is best known for performing "Katsubou," the ending theme for That Time I Got Reincarnated as a Slime Season 4 in the "Tensei shitara Slime Datta Ken" franchise.
On May 15, 2026, CiON shared the music video for that ending song. The release marked a documented point in CiON’s connection to Tensura through its anime ending theme.
