Jessen was an Enaran female who grew quite fond of Harry Kim during her time aboard the USS Voyager in 2373. The feeling was mutual, and the two of them spent practically the entire trip to Enara Prime together. She was an engineer and worked closely with Torres.
When B'Elanna Torres revealed the memories she had received from Jora Mirell, Jessen was hesitant to believe B'Elanna. But, after seeing B'Elanna earnest desire to share her experiences, she volunteered to use her abilities to establish a telepathic link. Then, she began to experience Jora Mirell's memories for herself by taking on Jora Mirell's persona and as they had with B'Elanna; the memories began with a secret late night romantic rendezvous with Dathan (VOY: "Remember")