A mane is a fictional demon

Demon (Dungeons & Dragons)

In the Dungeons & Dragons fantasy role-playing game, demons are the most widespread race of fiends. The demons are chaotic evil by nature, and are native to the Abyss...

 in the Dungeons & Dragons

Dungeons & Dragons

Dungeons & Dragons is a fantasy role-playing game originally designed by Gary Gygax and Dave Arneson, and first published in 1974 by Tactical Studies Rules, Inc. . The game has been published by Wizards of the Coast since 1997...

fantasy

Fantasy

Fantasy is a genre of fiction that commonly uses magic and other supernatural phenomena as a primary element of plot, theme, or setting. Many works within the genre take place in imaginary worlds where magic is common...

 role-playing game

Role-playing game

A role-playing game is a game in which players assume the roles of characters in a fictional setting. Players take responsibility for acting out these roles within a narrative, either through literal acting, or through a process of structured decision-making or character development...

. It is the lowest rank of demon in the Abyss

Abyss (Dungeons & Dragons)

In the Dungeons & Dragons fantasy role-playing game, the Abyss or more fully, the Infinite Layers of the Abyss, is a chaotic evil-aligned plane of existence. It is one of a number of alignment-based Outer Planes that form part of the standard Dungeons & Dragons cosmology, used in the Planescape...

.

Manes resemble little fat deformed men, and have no will of their own. Thanks to their recklessness they are used by more powerful demons as the simplest soldiers of the Abyss: they build up the core of the army of every demon lord and they are also the first demons to be sacrificed, whenever necessary. In large number they can be a dangerous enemy.