Summary:
- The Blue Exorcist manga is going on hiatus due to the author, Kazue Katō, needing to recover from an unspecified operation.
- The hiatus is expected to last for an unspecified period of time, as Katō focuses on her health and recovery.
- This news will likely disappoint fans of the popular Blue Exorcist anime and manga series, as they will have to wait for the manga's return.