In his younger days he used to be quite feral and chaotic, he's calmed down a lot now that's older and more worn out. But he's infamous now and hiding out on dragonspine where the trouble he's caused can't catch up to him quite yet.

Pretty gruff and in a pissy mood, he doesn't really want to deal with any other people ever again, haha too bad this random kid showed up one day and now he has a daughter I guess??

Seems to know a lot of suspicious information about a lot of different things. And is one of his pupils star shaped?

He used to travel all over teyvat, talking his way in and out of sticky situations. And when he dug himself in too deep he'd run away to another country with a new name and a new backstory. He has a quite a knack for winding up in a lot of trouble and is a wanted man in various places across the world.

He wasn't always found in the cities bothering people, he'd often explore the ruins of destroyed civilizations, he seemed to have a personal interest in it, but when asked about he never gave a straight answer.

after a while of living this "adventurous" lifestyle he finally started to wear down, it was getting hard having to always be on guard, and having to watch every step. So he just abandonded society and fled to dragonspine where no one would bother him ever again haha lol he thought.

So he comes home one day and there is A CHILD in his cave. She wont talk, she wont go near him and least of all will she go home. So SURE he could kick her out and let her freeze to death on the mountain. BUT THAT WOULD BE MEAN, but you might be wondering "isn't he mean?" well maybe but he's not actively going to kill a child. Okay so since she wont leave it's his job to keep her alive oops I guess she's his daughter now.

LATER IN THE STORY

So he figures that probably living isolated on a mountain in between two countries they can't go to (he can't go to mondstadt and she can't go to liyue) probably isn't a healthy environment for a young girl so OFF TO FONTAINE THEY GO! Fontaine is a place that he is not actively a wanted criminal in because neuvillette wouldn't let him run away without clearing his name.