The Mysterious Yuki Onna

Yuki Onna is surrounded by barrier blocks, the only way to get closer to her is to go under the ice. She has 372HP. I killed her with an arrow bomb, and she drops nothing. The loot chest in the back is also surrounded by barrier blocks. Her coords are -177 -636, very close to the Nesaak side of the Great Bridge, up high in the surrounding mountains.

If anyone knows anything about this mob, let me know. I'm just hella curious at this point.

EDIT: wow I literally just googled her name and its a spirit in Japanese folklore. I guess its just an easter egg.. but I still want that chest

 

There's a way to open that chest, few months ago I saw the chest is not there which means someone know how to open it, but I don't know how

 

https://en.m.wikipedia.org/wiki/Yuki-onna
"Yuki-onna(雪女?, snow woman) is a spirit or yōkai in Japanese folklore. She is a popular figure in Japanese literature, manga, film , and animation."