Yan Qiu

The sister of Mu Bai, she was sent to Europe to be a maid of the Casas Clan by Mu He. Her existence was only known by Mu Bai, his mother and Mu He. Due to this she was able to avoid interrogation by the Enforcement union after Mu He's identity was revealed. It is likely that she was a Black Vatican spy planted in the Casas Clan from the very beginning.

She is regarded as Salan's most important Disciple and is salan's trump card against Izisha. She was additionally responsible for the capture of Shura and the jail break of Leng Jue from the holy court.