Ayeka Masaki Jurai

She is the First Princess of the planet Jurai. By blood, she is the great-aunt of the protagonist, Tenchi.

A princess who had been searching for her fiancé—who was also her older half-brother, Youshou—after he went missing following a battle with Ryouko, a space pirate who had attacked Jurai. Driven by her longing for Youshou—and terrified by the fact that he was on the verge of being declared legally dead, leading to a flood of political marriage proposals that threatened to force her into a union against her will—she fled Jurai aboard her ship. She entrusted the ship's control to the Royal Tree governing the vessel and her personal guardians, Azaka and Kamidake, instructing them to "wake me up if you find a clue about my brother," before entering cold sleep and drifting through space as a self-imposed recluse.

She eventually arrived on Earth, where she encountered Ryouko—the very person responsible for her brother's disappearance—and was forced into combat. She, along with her younger sister Sasami, ended up living as a houseguest at Tenchi's home. At first, she clashed with Tenchi, unable to adjust to her new environment (and influenced by Tenchi telling her that "Youshou was my ancestor and passed away long ago"). However, experiencing Tenchi's kindness caused her to open her guarded heart.