Jiwu

Jiu (ジウ) was an adventurer and member of Masayuki's party. Secretly, she was the ninth-ranked of Rudra's Imperial Guardians.

Background
She approached Team Lightspeed out of curiosity after hearing rumors about them. Meeting Masayuki, Jiu called him a scumbag that waved around the mantle of “Chosen Hero”, but for some reason Jiu began to worship Masayuki over time.

Chronology
During the war with the Eastern Empire, Jiu and Bernie were exposed as secret agents of Rudra sent by Damrada to guard Masayuki. Following the orders of Tatsuya Kondou, they attempted to kill Rimuru, but were defeated and killed in the ensuing fight with Chloe and Benimaru, respectively. They managed to escape the Dungeon using Resurrection Bracelets, but were subsequently hunted down and killed again by Diablo; Rimuru resurrected them afterwards, albeit in a weakened state. After the duo reconciled with Masayuki, they protected him while he was being pursued by Cornu, with Jiu disguising herself as him to cover his escape. They returned with Masayuki to the Eastern Empire and assumed duties as his escorts in his new regime as emperor.