She is the only hybrid from the pod squad who is dead. Tess has been taught by Nasedo how to explore these memories from her alien predecessor's past and is therefore the sole hybrid from the Pod Chamber to remember, before she teaches Max how to do the same.
Kyle and Tess are, at first, quite attracted to each other, but eventually become more like brother and sister, with Kyle even once referring to her as his sister when one of his friends speaks about her sexually.[1]. Tess later goes to Isabel and Max's house, where she meets Max and Michael. He quickly hides when the Army shows up. When first introduced in the series, Tess appears to be obsessed with Max and fulfilling her destiny by being with him.
Max is called the beloved leader, Michael his second in command, Isabel his sister, and Tess his … Even though Max, Michael and Isabel didn't remember who she was for 10 years, they suddenly remember her when this is explained to them. Tess Harding is a recurring character on WB sci-fi series Roswell. Tess explains the house being empty was due to the movers arriving late. In her previous life, Tess was known as Ava. Then it is revealed that the gang was cloned and sent to Earth to prepare to save their planet. 1.13 Recovering the Satellites (season finale), 2.02 Ladies and Gentlemen We Are Floating in Space, https://roswell.fandom.com/wiki/Tess_Harding?oldid=18386. She moves into the Valenti household and begins to help Kyle and Jim become a family again.

She is the bait for the FBI and then blows up the building, killing everyone including herself in the process.

Tess reappears in the second to last episode of the series. She mindwarps Max, making him believe that their son can't survive on earth, forcing them to leave for Antar. She also feels remorse for the actions she had committed and has decided to redeem herself. Take your favorite fandoms with you and never miss a beat. She was raised by another alien, Nasedo, who had apparently been sent to Earth to protect them. Tess will not be appearing in the re-imagined.

Tess moves in with Sheriff Valenti and his son, Kyle, following Nasedo's death. When she came back, she killed agents so the FBI is hot on her trail. She puts the gang in danger again while they are trying to protect Zan. However, he had made a deal with Kivar (the enemy of the Royal Four) 40 years before: return home with Max's son (with Tess' help) and deliver Max, Michael and Isabel to Kivar, who would have killed them. Isabel quickly explains that Tess is her friend and new at school. Tess Harding is a recurring character on WB sci-fi series Roswell. Tess tries to avoid letting Isabel help with moving her stuff, saying that she is her guest and should not being doing any heavy lifting. She is the only one with mindwarping abilities. Although she is met with hostility, the gang agrees to work with her because of Zan. By doing this, he gets Tess pregnant. However, before it is too late, Liz, with Kyle's help (whom suddenly remembers Alex's murder when the effect of Tess' mindwarp vanishes) discovers the truth about Alex's death and they stop Tess, Max and Isabel before they can use the Granolith as a spaceship. At the beginning, Tess has a sister-like relationship with Isabel. Tess comes into the second season as a friend to Liz, Max, Isabel, Michael, Maria, Kyle, and Sheriff Valenti. This does not stop Max and Michael from being suspicious.