Guild

Players of CrossWorlds have the ability to form guilds, or groups of players working together towards a common goal.

Guilds
Guilds are organized companies of Seekers who closely work together on a regular basis, even moreso than the usual groups of Seekers. Guilds often hand out tasks for other players to complete for them in order to further increase their reach.
-Encyclopedia entry

In CrossCode

The First Scholars guild is central to the story of CrossCode, with all of its members being major characters.

Two other guilds, the Omni Gilders and the Last Minute Heroes, can be encountered. Both of them have an optional sidequest plotline associated with them.