Marlena Venn, whose story is intertwined with that of Tanis Venn, was his spouse. Ignoring the cautions of her mother, she entered into marriage with him, a decision she would come to regret. As time passed, Marlena discovered her husband's incorrigible infidelity and developed a strong dislike for him. Her duties included fixing the K-X12 battle droids used in his hunts and frequently resolving the problems he created. On their anniversary in 3956 BBY, she determined to openly express her true sentiments. While Tanis was isolated within the Dune Sea, she modified the droids to detonate upon his movement. She then secured her own hunting license, willingly paying double the standard fee to ensure her ability to act, and patiently waited for the opportune moment when he was vulnerable. Once she confirmed that he understood her message, she boarded the subsequent transport departing from Tatooine.
A Czerka Corporation protocol officer described Marlena as possessing a significant mean streak, stretching across a parsec. Additionally, she demonstrated the capability to manipulate Tanis Venn's droids, preventing him from recognizing the imminent danger until it was too late. Upon Revan's departure, she sarcastically requested that he convey her regards to Tanis, despite having communicated her true feelings through the droids.