Sei Ei

Tentang

Emperor Gaojun's attendant. He is a bit callous when talking to Shouxue but nevertheless treating her with respect and changed later on.

Formerly known as Que Er, who was orphaned when his mother committed suicide, and was tricked into a life of a male prostitute after trying to become an eunuch. Running away, the young Gaojun sheltered him and took him in as his attendant, and gave him his new name.

(Source: Wikipedia)

In the novels, it is revealed that he shares the same biological father as Shouxue, making them half-siblings.