Leeds Kariage is the daughter of Maneko Kariage and mother of 18-year-old Evilus Kariage. She maintains a glamorous, youthful appearance despite her son's age. Leeds exhibits a powerful obsession with gold, silver treasures, and valuable jewels, driven by ambition to obtain the fabled jewel "Paratomond," believed located in the legendary utopia Paratopia. Her personality includes a tendency to dominate her husband, Hachiro Kariage, often bossing him around daily, though she occasionally shows genuine affection towards him.

She accompanies the Kariage family on their space journey, initially following Jun Yagami at Evilus's behest due to his wish to marry Jun. During this mission, Leeds aligns with the family's ambitions to exploit Paratopia's resources, including seeking an elixir of immortality for Maneko and fulfilling her own desire for wealth. Her actions reflect the family's opportunistic, occasionally manipulative dynamics, though she does not take a direct leadership role compared to Maneko.