Made in Abyss season 2 is arriving soon and there's a lot you're need to remember about this ambitious anime. ... As we learn at Bondrewd’s house, they’re made out of your friend’s dead body.

Bondrewd is a mysterious White Whistle who managed to make a base in the fifth layer of the Abyss, and first debuted in the final episode of the series’ initial 13 episode run.