Shuang'er

Shuang'er (雙兒; 双儿; Shuāng'ér; Soeng1-ji4) is a servant of the Zhuang family in Huzhou. The matriarch tells her to follow Wei and serve him – as an expression of her gratitude to Wei for helping their family kill Oboi. She becomes Wei's bodyguard. Among the seven, she is the one who understands Wei the most.