Diabolus Darkdoom is a famous villain and former pupil of H.I.V.E. who reappeared after fooling everyone into believing he was dead, this was because Number One (under the influence of Overlord) had ordered for his execution after he had discovered some of his secret plans. He was a leader of G.L.O.V.E. but he gave over to Nero and is the father of Nigel Darkdoom, a student at H.I.V.E.
Diabolus was involved in many villainous plans. When he did reveal himself to Nero, he told him about the Dreadnought, the name of the 4th H.I.V.E book. He employed Chief Dekker for over 15 years, Dekker ended up working for The Disciples.
| Characters in the H.I.V.E Series|
|Main Protagonists in the H.I.V.E Series|
|Otto Malpense | Wing Fanchu | Laura Brand | Shelby Trinity | Raven | Dr. Maximillian Nero|
|Other Characters in the H.I.V.E Series|
|Number One | Pietor Furan | Anastasia Furan | Penny Richards | Tom Ransom | Ms Leon | Colonel Francisco | Nigel Darkdoom | Franz Argentblum | Chief Dekker | Chief Lewis | Diabolus Darkdoom | Dr. Creed | Lucy Dexter|