Carmen Sandiego Wiki

Xifeng's mom refers to the mother of Xifeng. She is briefly pictured in an old photo of them together in s4e1 “The Beijing Bullion Caper

She is implied to be deceased as Xifeng wells up in tears when speaking about her, although she trails off before mentioning what happened.

Xifeng and her father Huang Li vowed to perform an opera together in her memory. Xifeng's mom was a big fan of the opera.