Dirin was a female Talarian. She was noted to be fully figured, her hair atypically dark but streaked with grey.
By late 2382, Dirin was the leader of a faction of female Talarians who protested Commander-in-Chief Ronzel's decisions, and led a rebellion against the patriarchy. Dirin and those loyal to her cause attempted to disrupt diplomatic negotations between the Talarian Republic and the Federation being undertaken by Ronzel, Ambassador Endar, Jono, and Captain Jean-Luc Picard, first via a biotoxin in the food then using anesthezine gas. Dirin's second Velet led a team to kidnap Jono and Beverly Crusher, with the intent of forcing the Starfleet crew to respond with force, showing how oppressive they and the Talarian High Council were. Dirin believed that even though Crusher was a woman, she sided with the ruling patriarchy, and could not understand their situation.
Unknown to Dirin, her position has been secured by a series of assassinations orchestrated by the Tzenkethi Coalition with the ultimate goal of setting up Starfleet and the Federation and exposing what the Typhon Pact believed were their hypocrisy. Her position forced her to plan frequently with the Tzenkethi Dezinor, leaving her second Velet to do much of the actual work, which earned her respect from the other protestors. Dirin's ambition however motivated her to undermine Velet as much as possible, maintaining the balance of power within the organization.
After Jono and Crusher figured out the Tzenkethi's plot, they were able to placate Velet and the others, before those Talarians confronted Dirin. Dirin released the prisoners, allowing them to contact the USS Enterprise-E, calling off a planned military strike. Dirin agreed to step down from her position and face the consequences of her actions. (ST - Typhon Pact eBook: The Struggle Within)