Rudeus is feared by his children, but he is actually kind. He has brownish-blonde hair. Ranked 7th among the Seven Great Powers. He has three wives.

Called 'White Mama' by the children. It is said she is scary when angry. She has white hair, is great at cooking, and is very feminine. The first wife.

Called 'Red Mama.' She gives spankings when angry. A tsundere with red hair, she is scary when mad and quite selfish. The third wife.

Called 'Blue Mama.' She rarely gets angry and is very kind. She is a bit timid and tends to take responsibility or blame herself if anything happens to the family. She is a school teacher and commutes riding a turtle-like creature named Jiro. She has blue hair. The second wife.

A kind and serious older sister who is dedicated to her studies. She has brown hair. Age is around 15 to 16.

Quiet and doesn't talk much, but possesses the Migurd race's telepathy and can read hearts. She is a prankster who often pulls tricks; Eris once spanked her so hard she couldn't sit down. She has blue hair. Age 12.

He loves swords and trains often. He inherited Rudeus's fondness for women and has a crush on Aisha. He has red hair. Age 12.

Possesses a strong Laplace Factor, giving him immense strength; he once nearly crushed Rudeus's arm during arm wrestling. He will eventually become the 5th of the Seven Great Powers. He has green hair. Age 9.

She loves magic items and spends her free time tinkering with them. In the future, she will create Magic Armor. She has blue hair. Age 4.

The only one in the Greyrat family who is a total daddy's girl, and Rudeus spoils her. She has red hair. Age 3.