Daruni was a massive, fat demon with yellow eyes and navy blue skin. He was covered in a slime-like substance.
Daruni seemed to posses a great quantity of strength.
Daruni was summoned by Lord Zennon, alongside Devilman and Rerasu. After Akira Fudo and his father had fallen into a crack in the ice and at the feet of the demons, Zennon kills them and commands his three bodyguards to fight to the death over ownership of Fudo's body. The winner would have been allowed to go fourth and cause widespread havoc.
Devilman sets about fighting the two and after a short tussle he throws Daruni on some low hanging Icicles which spear through his chest.
- Daruni's concept artwork depicted him with three eyes, instead of two.
- The concept art version of Daruni cameos in the manga Animal Kedaman, showing Daruni entombed in ice alongside several other demons.
- The conceptual version again appears in the manga 'The Abashiri Family', working under the demon Muzan.
- Daruni cameos as a minor antagonist in the manga Mazinger Angels.
- Ironically, in spite of appearing in several other works, he has never returned in any subsequent Devilman series.