Princess Ayeka is the crown princess of the planet Jurai and would have been the future queen had she stayed there. Her half-brother and fiancee, Yoshou, left the planet when chasing a the space pirate, Ryoko, when Ayeka was very young. He never returned. When she was old enough, Ayeka went searching for him in her spaceship, Ryouuh. She brought along her mischivous little sister, Sasami as well.

When Ayeka arrived at Earth, her guardians detected Ryoko, but Ryoko's criminal profile ran out five seconds later. Ayeka still chased her since she was her only lead in finding Yoshou. She managed to capture her and Tenchi, but Sasami created some mischief, though, and let Tenchi out of his cell. She wanted him to steal Ayeka's headress that controlled the ship. Tenchi escaped with Ryoko, and they destroyed Ayeka's ship.

Since she was stuck on Earth, she continued her search for Yoshou. She managed to find him, but he had grown into an old man being away from the anti-aging waters of Jurai. He told her to set her heart on his grandson, Tenchi, though. She did just that, but she was not the only one to love him. She battles fiercely with every other woman in the show for his attention. Princess Ayeka's name is taken from the word 'ayekanaru' which means fragile or frail.