|Title||Gufo di Nebbia|
|Manga Debut||Chapter 163|
|Anime Debut||Episode 90|
Mukuro is a unique Box Weapon that was originally a Rain Owl. Its attribute changed to Mist after it was possessed by Mukuro. Though many call it "Mukuro", whether it is satisfied or not with the name is unknown. It originally belonged to Glo Xinia, being his side box weapon.
It seems that it can construct illusions just like other Mist-attribute Box Weapons, but its skill is unknown.
- The Japanese word for owl is fukurō, which can be compared to Mukuro. His name can be spelled Mukurowl too (Mukuro + owl).