Hornet Sonia is a young Martian who belongs to their upper class, the High Martians, who encounters Aquila Yuna during her escape with Aria. Sonia can use the element of Darkness.
Sonia is the daughter of Mars and half-sister to Orion Eden. She believes in the ideals of her father and fights for his goals. Even though their mothers are different, she loves Eden as her younger brother, and wants to see him as King of the new world, protecting the new Athena. It was created from a small Medea, whom he refers to as his mother, although not of the same biological daughter.