Senis was a female Romulan who joined the Unification movement.
In 2382, Senis was part of a group of Unificationists who traveled from Glintara to Janalwa to support and advise the Kinshaya Devotionalists in their non-violent protest of the Kinshaya government. The young woman struck up a quick friendship with another Romulan on the journey, Janil, who was actually Starfleet Lieutenant T'Ryssa Chen under cover.
After arriving in Rashtag and meeting with the Devotionalists, the two groups meditated together into the evening. The following morning at the first public rally in Niamlar Circle, Senis teased Chen that she had not returned to her bunk that night, having last been seen leaving with Lorrav, although Chen admitted the two had not engaged in what Senis was implying.
The local Inquisitors ordered the assemblage to disperse, and when some of the Kinshaya and Romulans fought back, Breen shock troops fired on the crowd with disruptors. Senis was one of two Romulans who died as a result. (ST - Typhon Pact eBook: The Struggle Within)