Tierny is one of the main antagonists of the animated series Star Wars Resistance. She serves as an agent in the First Order Security Bureau.
Specially trained by the First Order, Agent Tierny hopes to restore peace to the galaxy through absolute order. Tierny is a master of manipulation, tactically luring her targets into a false sense of security rather than using more aggressive forms of interrogation. Her arrival at the Colossus platform, as part of a First Order security takeover, ushers in sheer chaos when the platform is plunged deep into the waters of Castilon, leaving only Doza Tower above sea level.
- The original outline of "Descent" had Commander Pyre as the one with the task to arrest and question Tam Ryvora instead of Tierny. In the episode's first draft, rather than an agent, Tierny was an admiral, but by the second draft, Tierny was redefined into an interrogation agent. Much of Tierny's look was inspired by real-world police gear, with her helmet being a mash-up between those worn by Darth Vader and Agent Kallus.