Arhidreth was the powerful king of Thelisae on Hellenes Gracca. He resisted Patrev's claim to sovereignty over the planet. In 802 BBY, Patrev secretly hired pirates from Tarnooga to attack Thelisae. In the insuing battle, they targeted and slew Arhidreth. Arhidreth was succeeded by his lovely but stupid wife, Queen Alren-hi. The following year she gave birth to her ninth son by Arhidreth. Then, she was seduced by Patrev, whom she married.