Devilun appears as a small bat-like demon, with two large, foldable ears, which are pink and green respectively with a black ring on the inside. He has two horns, each with a highlight with the same color as the ear they are in front of, with a small golden-yellow crown usually seated behind his right horn.

He has grey eyebrows over each bridge, grey hair with two round eyes that are green and pink, respectively. His fur is primarily grey from the top of his head, lower body and tail, with white fur on his face and body.

He has short stubby arms, with a set of pink and green claws on each paw, respectively. In the center of his body is a diamond patch of pink fur, with an Evil Eye in the center.

He has a pair of green colored bat wings, with black forearms, each tipped with a diamond, with a spike on the thumb. Notably, he wears a black cape with a pink-green gradient on the inside, which he uses for flight. He has a skull shaped pendant on his neck which changes expressions depending on his mood.

(Artist, https://twitter.com/BAYACHAO. Extra Notes: LOL I'm so dumb. I thought there were no characters since I'm used to searching the Japanese name [Debirun] because I'm like that. Also, check out this bot bye @JustSomeDudeOnTheInternet it's way better.)