Tyrka was a Human woman, specifically a member of Eco-strike, an eco-terrorist organization that operated during the Cold War era between the Galactic Republic and the reconstituted Sith Empire. Alongside her companion Momi Andrell, she dedicated herself to rescuing the shanjaru, a non-sentient species teetering on the brink of extinction. When Drooga the Hutt schemed to consume the male Shanjaru, Tyrka resolved to resist and collectively transform the galaxy. Later, she crossed paths with Voidhound, a smuggler employed by Drooga and Ga'ram to thwart Momi's efforts to retrieve genetic material from the female shanjaru. The smuggler managed to persuade Tyrka that his presence was due to a simple miscommunication and that he was there to provide assistance. Tyrka, convinced, entrusted the smuggler with a data pad containing information to locate Doctor Lazhae, and then departed.