Original Character

OCs, generally speaking, are either based in a universe/setting of their player's creation, or created as part of the population of an existent canon. For example, Clair Watson is a Marvel-based OC who has significant interaction with Doctor Otto Octavius, while Dr. Grey comes from a story written by Darksong.

Because of how long the Nexus has existed (in various forms), there are also OCs whose universe/setting of origin is the Nexus. These include, naturally, Improbable Nexus Children.