I crossed an ocean of stars looking for my son. I'm not going to let you get in my way now.
~ Rhea to Supergirl
Rhea, Queen of Daxam is the main antagonist of the second half in the second season of the superhero TV series, Supergirl.
She is the cruel, sadistic and tyrannical leader of the planet Daxam and the mother of Supergirl's love interest, Mon-El. Desiring to secure her rule over Daxam, she and her husband Lar Gand traveled to Earth to bring him back. But after Mon-El decided that Earth is his new home with Supergirl, Rhea, unable to accept this, killed Lar Gand and secretly declared war against the Girl of Steel.
Rhea manipulated Lena Luthor to create a portal to bring Daxamites to Earth as an invasion. During her battle with Kara, she was killed after she succumbs with lead inhabiting the atmosphere.
Rhea was born on the planet Daxam and at some point, she became the planet's queen. She met and fell in love with a man named Lar Gand, who became the king of the Daxamites, and they later had a son named Mon-El. However, unbeknownst to both her husband and son, Rhea was secretly mentally unstable, being delusional, power-hungry, and hypocritical.
The actress, Teri Hatcher, also portrayed Lois Lane in Lois & Clark: The New Adventures of Superman.
There are two characters in the DC Comics named Rhea, although none of them are related to this version: The Titan revered as the Goddess of Earth, a supporting character of Donna Troy from the New Teen Titans comic book series, who is an adaptation of the aforementioned deity, and Rhea Jones, the electromagnetic heroine Lodestone, a member of Doom Patrol.
Like Non, Rhea's portrayal as the season's main antagonist was criticized by both critics and fans, continuing their streak of poorly received main antagonists until Reign's introduction in the following season.
Rhea is one of the most cruelest major villains on the TV series, alongside Indigo and Morgan Edge.