Characters like Chi in Chobits and Reg in Made in Abyss blur lines between human and Android. Android characters, such as 18 ...

It covers the period from when Riko descends into the Abyss with her robot companion Reg, reaching the second layer where they meet the White Whistle Ozen who reveals information about Riko's mother.

After the events of Made in Abyss: Dawn of the Deep Soul, Riko, Reg, and Nanachi enter the weird bubble ship and descend through a deep ocean into a sunny land--the titular "land of the scorching sun.