Relai was a Romulan officer in the Romulan Star Navy during the 24th century.
By 2371 he held the rank of Sublieutenant and was stationed aboard the IRW D'vairin in the Security Department.
On stardate 4853.1 he was part of several boarding parties beamed aboard the IRW Sha'arik to reclaim it from Starfleet, leading the team sent to Engineering. Upon materializing aboard the warbird he and the other teams contracted Vidorian-B Fever. ("Marie Celestial")