Arieta escaped from Earth Corps' laboratories after watching her friends die in their experiments. She heads for Earth while being chased by Earth Corps' forces looking for help. Along her journey she makes friends with nearly everyone she meets due to her kind-hearted nature. Later in the story she loses control of herself and begins attacking her comrades. When she finally breaks free of her mind control she realizes that she is the power source for the weapon that Earth Corps is developing. With the help of her new friends, she attacks Earth Corps to put a stop to their schemes. Her ending has her absorbing the blast from the weapon and waking up with her friends by her side.
She pilots the FZ-100 FORDY.