Athena

Athena was one of the People of the Green Mist. She encountered the Jupiter 2 when it was re-fueling at an American fuelling station in outer space. Athena the Lorelei and her people survived on atomic fuel, so she followed the ship in search of sustenance. Athena the Lorelei used some kind of hypnotic or telepathic powers to lure Dr. Smith outside the ship in hopes of delaying the ship so she could feed.
In her first appearance, in the episode "Wild Adventure," the Robinsons had to make an emergency stop at a fuel station. Dr. Smith believed he was having hallucinations of a beautiful green girl. It turned out that the girl was real and had a thing for Dr. Smith. She also had a thing for sparkly green tights and wore a clear plastic dome for a hat. In This episode she was credited as "Lorelei."
Athena the Lorelei appeared again in Season 2, in the episode, "The Girl From the Green Dimension," but her name was changed to Athena. Her race was called Lorelei, and they lived in the Green Mist. Athena had a boyfriend, Urso, who became jealous of Athena's attraction to Dr. Smith. Urso turned Will green. After Urso and Athena patched things up, he changed Will back to his normal color.
* In Greek mythology, Athena was the goddess of wisdom, strategic warfare, and heroic endeavour.
* A Lorelei was also a deceptive water siren whose songs lure sailors to their doom.
* She is known as "The Green-Skinned Space Babe" to most fans.
* The character was originally named Lorelei in "Wild Adventure," then renamed Athena in "The Girl from the Green Dimension."
* A trading card later identified her as Athena the Lorelei.