Peerage

A Peerage (, Piareiji; lit. "Familial Dwelling of Bloodsworn Comrades") is the terminology used as a reference to a group of warriors serving under one master, bound together by strong ties of friendship, loyalty, virtue, and camaraderie — thus gaining incredible power that's normally forged by a magical, and sometimes blood-based, contract.

Originating from the Magic Knights in an effort to better utilize their newfound talents (as they were originally untrained and rather weak, in comparison to now), it later spread to other races and factions, who sought to band together for multiple reasons, the most common being to achieve a greater power, out of respect or admiration for another individual, or to accomplish a common goal. This basically made it a universal concept accepted by all walks of life.

The number of Peerages are bountiful, some good while others being evil; it's such that the creation and management of said Peerages are usually handled by government officials or members of the Magic Council. It's said that Peerage is an archaic term, and it's alternatively called a Partique (, Pātīku; lit. "Synchronized Group of Allied Warriors") to keep up with modern times; however, there are certain individuals who still call it by its original name to keep with the tradition.

Trivia

 * While this is based on the system of the same name from the anime/light novel series, Highschool DXD, this leans more to the part system found in RPG games while taking some references from the actual system used during medieval times into the current era. In a sense, this serves as a means of replacing the guild system from the canon, instead having small groups to organizations in its place, as the author felt that it didn't turn out the way he wanted and there was a severe lack of information when compared to other anime/manga focused on the same theme. This works well in the Heroic Chronicles storyline since its completely A.U. and focuses on multiple locations.