A male black hole. He was the one who first thought of this pact and is the type to absolutely loathe death. Being a black hole, he can fly and suck things in—if he sets his mind to it.

A male tree. He is a bit of a show-off and calls himself the (self-proclaimed) father of life.

A female blueberry pie. She is a blueberry pie, but... unfortunately, the blueberries are explosive, so she blows up if she gets too excited. Because of this, she stays quite calm.

A male pen. He is quite a coward and is terrified of pentagons. He is friends with Liy. His nickname is ㅸㅔㄴ (Ben). He has a debt of 200 billion vigintillion dollars.

A female glass bottle. She is the most cheerful and a bit airheaded. Being a glass bottle, she breaks easily. Of course, they can just use the recovery machine, also known as the Recovery Center, to revive other objects.

A female plastic light switch. Flipping her switch the other way reveals a hidden switch that releases her stored power. She also has a gimmick where sticking to a wall turns on a nearby light. She loves adventure.

A female pillow. She likes killing. (Not that she enjoys it or does it recklessly.) She always carries a kitchen knife and a research notebook, loving to observe and record strange things. She has a 'crazy eyes' personality.

A female remote control. She is one of the few robot characters in BFDI. Due to her nature, she always carries batteries; if they fall out, she dies instantly and won't wake up until they are reinserted. Her voice is a TTS to show she's a robot. She seems human-like for the most part.