Xiao

Season 1
Not much is known about Xiao aside from the fact that she is originally a zombie (labeled No. 23) that obeys the commands of her master. Although she finds fighting to be "scary and hard," she continues to do so believing that she cannot run away. It's possible she was a human girl or also an artifical being.

Xiao eventually learned from someone that her loved master had passed away on the battlefield. In order to prevent her master's lament, she made the suggestion to create immortal soldiers. She carries a talisman with her at all times. Despite feeling a bit saddened by this turn of events, she believes that as long as her talisman is with her she will move according to her master's wishes.

She is mentioned in chapter 28 by Jake when he calls for her and Asura. It is possible she went to become an assistant to the imperial guard.

Season 1

 * Soi: "Looks like Master."