Cain Seanain is a Cain of the Skyre Folk associated with Inis Tierneg. The Cain is one of the established Skyre communities of the archipelago and participates in the same decentralized political and religious traditions found among the other Cains.
Records from the period surrounding the Asnor Succession War of 8723 SE identify Ardghar Stillglade as its secular leader and Cairrean Heartwood as its Athair. Known Wave Riders associated with Seanain in those accounts include Fínín Riverfoot, Odhrán Tidehunter, Dunla Greendrop, and Ceara Deepdream.
Skyre Folk associated with Cain Seanain took part in the coalition opposing Ulrik Lindvig during the Asnor Succession War of 8723 SE, including support for the forces that fought around Aalund. Their participation reflected the broader reality that the peace between Asnorland and the Skyre Folk did not prevent individual Cains from making their own political commitments.