Rudeus Greyrat

Rudeus Greyrat is the main protagonist of Mushoku Tensei: Jobless Reincarnation.

He is a 34-year-old NEET and shut-in from modern Japan who, after a tragic death, is reincarnated into a fantasy world with all his previous memories intact. In his new life as Rudeus Greyrat, he is born into a kind and relatively well-off adventurer family.

Key characteristics:

• Extremely high talent for magic (considered prodigious even among geniuses)
• Starts training in magic from a very young age and quickly reaches advanced levels
• Highly strategic and analytical way of thinking (retains his adult mind)
• Deep knowledge of modern concepts (physics, math, engineering basics) that he applies to magic
• Initially perverted and socially awkward due to his past life trauma and habits
• Gradually matures over the story, working to overcome his previous life's regrets and weaknesses

Rudeus is one of the most complex and polarizing isekai protagonists — talented and hardworking, yet deeply flawed, self-aware of his own creepiness at times, and constantly trying (with mixed success) to become a better person in his second life.