Flersiders

Flersiders is a term used primarily within speculative fiction and online fan communities to describe inhabitants, travelers, or affiliates of a fictional setting known as Flerside, or, less commonly, the planet Fler. The exact scope of the term varies by work: in some sources it denotes residents, in others it marks explorers who reach Flerside, and in roleplaying contexts it can refer to participants who assume flersider personas. The term appears to be a portmanteau of Fler and sider, with sider as a suffix indicating a person associated with or traveling to a place.

In practice, flersiders are depicted across a range of media, including fan fiction, fan art, and collaborative worldbuilding projects. Community activity often includes creating character bios, lore documents, timelines, maps, and glossary entries to maintain a coherent fictional world. Some fans maintain online glossaries or wikis to document canonical and non-canonical material.

The use of flersiders illustrates how fans construct identity within shared fictional universes and how demonyms develop within subcultures. Because the term lacks a formal, centralized definition, it is primarily encountered within fan communities rather than in mainstream scholarly sources. References to flersiders should be understood as descriptions of fictional characters and community practices rather than real-world groups.

See also: fan fiction, worldbuilding, alternate reality game, demonym, fandom.