The Clan Assembly held dominion over the Twi'lek home planet of Ryloth, along with its colonized worlds like Aaloth, throughout the High Republic Era. This governing body, headquartered in the Assembly building located within Lessu, the capital city of Ryloth, formally ratified the articles of membership. This act brought Ryloth and other Twi'lek planets into the fold of the Galactic Republic.
The initial reference to the Clan Assembly occurred in the 2021 audio drama The High Republic: Tempest Runner. Cavan Scott penned the drama, which featured a complete cast of voice actors.