Rudeus Greyrat's dedication to his wives and children sets him apart Mushoku Tensei. Despite his imperfections, he becomes an example of family loyalty, cultivating lasting relationships.

His regrets inspire a strong desire to provide emotional support, advice, and affection to his loved ones. Rudeus's arc goes beyond personal development, emphasizing the value of familial relationships.

This devotion connects with viewers, making his transformation from recluse to caring father and spouse a compelling and realistic journey that adds depth to the series.

1. Lucy Greyrat

Lucy Greyrat, Mushoku Tensei

Rudeus and Sylphiette Greyrat's first child is Lucy Greyrat. Due to her father's busy work schedule, Rudeus' daughter initially struggled to connect with him.

Their relationship grew stronger over time, though at a young age she mistook Orsted for her father due to their common attribute of white hair. When she was around 4–5 years old, Lucy recognized Rudeus as her father, though she still lamented his frequent absences.

Lucy began to feel detached as she grew older, believing that Rudeus had no expectations for her. However, before her marriage to Clive, a passionate conversation healed their friendship.

This character's trajectory illustrates the difficulties of the father-daughter dynamic, as well as the need for communication and understanding in family relationships.

2. Lara Greyrat

Lara Greyrat, Mashoku Tensei

Lara Greyrat plays an important role in the story of Mushoku Tensei. Lara's birth, as Rudeus' second child and the first of his relationship with Roxy Greyrat, is linked to a great prophecy.

She is revered by the Doldia Tribe and is prophesied to be their long-awaited savior, giving her existence a sense of destiny. Despite being Rudeus's second son, her future importance surpasses her birth order.

Lara's story adds layers of suspense and intrigue. The intriguing prophecy surrounding her, as well as her eventual role as a savior, add mystery and excitement to the overall plot.

While Mushoku Tensei concludes without fully revealing her fate, it provides room for further exploration in the proposed sequel series. Lara Greyrat reflects untapped potential, promising future adventures and revelations in the wonderfully detailed universe.

3. Ars Greyrat

Ars Greyrat, Mushoku Tensei

Ars Greyrat is the third son of Rudeus Greyrat and the first son of Eris Greyrat. Ars, who was born while Rudeus was away, tells a unique story in Mushoku Tensei.

His ancestors carry the weight of a heroic tradition, as he was named after the famous Great Hero of Humanity, Ars.

In another universe, Ars runs away with Aisha Greyrat, falling in love with her and suffering a family backlash. The arrival of a 12-year-old son strains his bond with Rudeus, leading to his eventual return, which is welcomed by the family on certain terms.

Ars' prowess is overshadowed by his troubles with healing magic, as shown in a deleted side story. He is trained in the Sword God Style and is proficient in fire and water magic.

4. Sieghart Saladin Greyrat

Sieghart Saladin Greyrat, Mushoku Tensei

Sieghart Saladin Greyrat, also known as Sieg, is the fourth son of Rudeus Greyrat, and his mother is Sylphiette Greyrat. He is the younger brother of Lucy and half-brother of Lara, Ars, Christina, and Lily.

He is the main character of Jobless Oblige. Sieg Greyrat, unlike his stoic sister Lara and tearful brother Ars, is a typical child in Mushoku Tensei.

As he grows older, he is inspired by his father's heroic stories, developing a strong sense of justice. He engages in acts of heroism at midnight, hiding his identity.

As a teenager, he fights with meaning, just like his father. Sieg, as the God of the North, has his master's habit of announcing his name audibly before battle.

Throughout the series, his journey reflects the common struggle to find one's own identity, combining heroism, growth and paternal bond.

5. Lily Greyrat

She is a carefree person who enjoys anything related to magical tools and magical items. Lily is an airhead with little sense of direction, which causes her to get lost on her journey between her home and her office.

Lily inherited the Magic Armor research and finished the All-Purpose Magic Armor in K483. Despite her dimwitted nature, her work was essential in decreasing the casualties during the subjugation of huge creatures.

Lily is terrible at riding, despite having studied it since she was a child. On the other hand, her swordsmanship and magical skills are far above average for a Greyrat sibling. She is also a talented researcher.

6. Christina Greyrat

Christina Greyrat, Mushoku Tensei

Christina Greyrat, the youngest daughter of Rudeus and Eris, possesses a distinct appeal. Unlike her siblings, she openly enjoys being pampered by her father.

Her close friendship with Rudeus causes her to often prefer his advice over her mother's, indicating her faith in his wisdom.

Rudeus is first suspicious of her naivety when she enrolls at Asura Royal Academy, but his uncertainty turns to pride three years later when he observes her resourcefulness during a plot to discredit her.

This demonstrates their development and ability to deal with difficult conditions.

Christina's determination and growth set her apart from the other Greyrats. Her quest, however, takes an unexpected turn when Luke and Ariel's son Edward approaches her about marriage.

This twist complicates her character by connecting her desires and decisions with family dynamics and social expectations, adding to the series' narrative plot.