Adell is the main protagonist of Disgaea 2: Cursed Memories and a demon who mistakenly believes he is the only human in Veldime not effected by Overlord Zenon's curse. In fact, Adell is the son of the demons Shura and Selion, whom he encounters many times on his mission to defeat Zenon.
Adell is courageous and determined, never backing down from a challenge or resort to dirty tactics. Although he prefers to solve his problems with his fists, he is in fact quite intelligent. He is kind to those he cares about, particularly his family, and will never ever break a promise, as it's "not his style".
In Disgaea: Afternoon of Darkness, Adell makes a cameo appearance in the Demon Hall Mirror stage and fights Laharl twice: once alone and later with Rozalin. In Disgaea DS, he is a secret character that can be recruited, along with Rozalin, after this second battle.
Adell was also added as a DLC character in Disgaea 3: Absence of Justice and Disgaea 4: A Promise Unforgotten along with Rozalin.