She was a minor Goa'uld who only rose to some power by allying herself with many powerful System Lords including Cronus, Camulus, Svarog, and indeed even Anubis when he first challenged the System Lords. Athena was once the rival of Qetesh, but later came to ally with her once she discovered just how smart and cunning Qetesh truly was. The two attempted to search for the Clava Thessara Infinitas, the key to infinite treasure, which was meant to reveal the location of a cache of hidden Ancient technology, but Qetesh double-crossed Athena before the two managed to do so. Although Qetesh never actually discovered the key, she led Athena to believe that she had.
Quite sometime after this Athena allied herself with Ba'al and inhabited the body of The Trust agent, Charlotte Mayfield when Ba'al came to Earth after the System Lords hierarchy fell from any influence it had. Using Mayfield's position as Vice President of Farrow-Marshall Aeronautics, Athena provided Ba'al with anything that he required, and even met with Lt. Colonel Samantha Carter (perhaps using the drug which Ba'al developed to keep the presence of her symbiote hidden from Carter) when Carter was inquiring about the disappearance of Farrow-Marshall's Chief Financial Officer, Alex Jameson, who was actually taken as a Goa'uld host and was in the custody of Gerak. In addition to her duties as Vice President, she was also aide to at least one of Ba'al's clones and escaped with him when the Tau'ri attempted to use symbiote poison to kill Ba'al. (SG1: "Ex Deus Machina")
She captured Vala Mal Doran in 2006, using a memory recall device hooked up to another machine in order to gain information which had been suppressed by Vala's mind when the Goa'uld Qetesh left her. Athena was looking for a tablet which she still believed Qetesh had found, never realizing that Vala would not be able to give her the information she wanted. Vala managed to escape, however, which Athena's agents later reported to her. Although Athena's agents thought that Vala had been killed during an explosion at the facility she was held captive in, Athena ordered them to continue looking for Vala while she continued to run Farrow-Marshall Aeronautics. Her fate remains unknown as she has not been seen since then. (SG1: "Memento Mori")
- Athena on the Wikipedia