. It appears to be an indie or niche title where the core objective or premise involves the disappearance of a character named Riko-chan. Riko Amanai (Jujutsu Kaisen) : In the series Jujutsu Kaisen , Riko Amanai
Below is an exploration of the different meanings this "missing" mystery can take on. 1. The Cultural Mystery: " Chan Is Missing " (1982) riko-chan is missing