Character from Made in Abyss.
Vueko, whose full name is Vueroeruko, is a strange, mysterious and shy young woman. She lives chained in a deep pit of sludge beaneath the Ilblu Village in the 6th Layer of The Abyss. It seems as though she used to be a delver of some sort, back before Ilblu existed, and had a role in its creation.