ˎˊ❤😈Devil Cookie😈❤ˋˏ

Devil Cookie's introduction video implies they make nefarious deals and contracts with other Cookies, further suggesting the price would be the Cookie's soul, much like depictions of devils in literature. Much of their dialogue and their skill heavily imply that many Cookies have met this unfortunate fate. In the Shroomie Shenanigans Story, despite the story itself being an April Fools' joke, it is suggested that Devil Cookie's primary job is to punish Cookies, while Angel Cookie, as their opposite, is in charge of rewarding them. They seem to enjoy being feared by other Cookies, constantly pulling pranks on them.

The Korean, Japanese, Taiwanese and Mainland Mandarin versions of the game explicitly state that Devil Cookie was formerly an Angel Cookie, corrupted by carbonic acid and bat extract, therefore making them a fallen angel. It is unknown what Devil Cookie was like prior to their corruption. Angel Cookie Angel Cookie is shown to trust Devil Cookie despite the latter's resentment of them, implying they may have been friends at one point. In Angels & Devils, they already know each other and are stated to bicker constantly. Angel Cookie treats Devil Cookie like an old friend, but Devil Cookie does not reciprocate it, treating them as a rival instead. In most AUs, they are siblings.

Devil Cookie is basically what you would expect for a demon.