Sparrow's Mǔdān

Mudan initially appears angelic, with black hair, black eyes, and a thin build.

Mǔdān is presented as a young woman who likes to talk a lot and all she wants is to do for her older brother and for this she is not interested in what she has to do even if she has to betray Hakuryū, who had saved her when she was a child with her brother or even die for him.

Mǔdān is Fēi-Yǎn's younger sister, one day the rivers overflowed and the entire village where they lived until Hakuryū saved them, which is why they decided to live in Senkyō. After the defeat of the squad led by Liu-Xing against Dohko, Mǔdān meets Senkyō where he talks with Hui about what happened, however they are interrupted by Hakutaku who comments that as Mǔdān says, his eyes are able to see everything and that is how he obtained power over Senkyō but they also show him unpleasant things like selfish people pursuing their own ends, after this Mǔdān is only dedicated to being a "witness" without participating, while Hakutaku mentions that in the holy war fought twelve years ago there were also people like that and that Hades did not have the correct solution to dominate this world because he did not understand the beauty of it and the creatures that live in it, then mentions that to rule the world it is necessary to be aware of all the creatures that live in the world and that is why the only person indicated to rule the world is him, after saying these words Hakutaku mentions that the young tiger will be an obstacle to what Huī answers with a "yes" because Dohko had been trained in that place and that he will undoubtedly return to it upon hearing this. Hakutaku asks Huī if he would be capable of killing an old companion because he and Dohko are classmates, to which Huī that he was never his companion and that just hearing his name the fangs on his back throb with anger and that it will be with the same ones that pierce the throat of the young tiger because the fox on his back cannot wait any longer, after hearing these words Hakutaku orders him to go and release his anger, also warning that he will be watching, to which Huī answers again with a "yes".

In the Senkyō, Mǔdān talks to the sparrows when she finds out about Huī's defeat, Taonia mentions that it doesn't matter because Huī wasn't that "big of a deal", she also comments that he was a weirdo that whenever she wanted to chat he would always tell her that she talked too much after this Mǔdān mentions that talking is a lot of fun but anyway she won't be able to talk to him anymore, after this Taonia begins to descend from the roof where she was being surrounded by the sparrows while she states that she will do her best so that her older brother will congratulate her and that she will possibly smile again when she defeats the young tiger, while she pronounces these words the young woman's Tattoo covers her body and she prepares to "get serious".
Mǔdān waits for Dohko inside a Senkyō building where through the sparrows he manages to separate Dohko from Liu-Xing, the latter falls into Mǔdān's trap and is caught by her, who quickly approaches Dohko and tells him that he has nothing against him but that he can't let him get in the way of Hakutaku but that before killing him he wants to talk to him one last time, at that moment the sparrows and attack Dohko with the Pohuai Xiaozhuan, then Mǔdān mocks the Libra Saint a little while the Gold Saint realizes that the young woman in front of him is none other than Mǔdān, who is glad that Dohko remembers her and tells her that all she wants is to see her brother smile, upon hearing this the Gold Saint mentions that he does not want to fight against her since he has known her since she was a child in response to this Mǔdān calls him "crybaby" and uses the sparrows again to attack Dohko.

However, the latter notices the bells and manages to snatch some of them, so he decides to use his Yūko Sennin Enbu technique to finally get rid of all the bells, so Mǔdān directly attacks the Libra Saint, but the latter stops her. After this, Hakutaku arrives at the battlefield, so Mǔdān approaches him while Dohko realizes that Hakutaku is actually Fēi-Yǎn. During the fight between Fēi-Yǎn and Dohko, Mǔdān is only a "witness" without participating until the end of the battle where Fēi-Yǎn is about to fall off a cliff but Dohko saves him. Seeing this, Mǔdān asks the Saint of Libra not to let him go and quickly goes to him, the young woman in tears tells him that she is not interested in Senkyō or her home because she only asks him to take care of her. After the battle, Dohko wakes up in the five peaks where in the distance she can see Mǔdān next to Fēi-Yǎn.

•Pouhai Xiaozhuan: Mǔdān and his human-shaped Sparrows gather around their victim and emit a series of sound waves that infiltrate the victim's body in bursts, eventually exploding inside, causing severe damage.