Made in Abyss: The Unknown Above

You've probably heard about Made in Abyss. If you hadn't, I suppose you should check it out. It is a wonderful manga/anime series, and please don't judge the cover. Things are not what they seem on the outside.
----------------------------------------------------------------------------------------------------------------------------
The tale of a young blonde girl along with a strange figure going into the abyss, the bottomless pit, has been heard. However, this tale isn't about them. Join Sune, an uncommon Hollow, with fox - like characteristics, and Onyxi, an robot with strange interesting characteristics, as they rise up to the First Layer, seeking for a home, and hiding themselves from strange creatures; such as humans, crimson split - jaws, and more.