Made in Abyss
Bondrewd the Unusual, also known as the Lord of the Dawn, is a legendary White Whistle whose morally dubious discoveries have greatly contributed to the knowledge of the Abyss. His methods, though not judged by the guild, are unethical; including the illegal trafficking of relics, the creation of dangerous drugs, and human experimentation.
Faputa is a character from the Made in Abyss anime who is a resident of the sixth layer.