To re-cap in the first few chapters after she escaped the brothel she disguised herself as a male beggar and followed a bearded uncle who gave her a silver. It was just to get past the guards at the gate but she followed him all the way to the forest because they were going the same way and she needed herbs to fix her wounds and counteract the poison she was given.
As
@proulout said in chapter 9 it's revealed that the uncle face was a disguise, he was a young white haired man called "King Yama" or king of hell
On chapter 77-78 we see them reunite with bearded uncle as she is taking a bath, in which he is hiding from the black market guards. She pants him. LOL
The next chapter or so you find another identity of bearded uncle/king Yama is as Ling a famous teacher/prodigy of Nebula Academy and no one knows his origin...
Also, he said in this chapter that she saved him when his cold poison acted up in the 9 entrapment woods, but I can't remember what chapter that happened at. (the her saving him part)