Matthias, despite the heightened mental age and experience of a seasoned adult from his previous life, often displays a charming naivety when faced with ordinary social situations. His past life as an overwhelmingly powerful but isolated Sage left him without the opportunity to form normal relationships, communicate casually, or navigate the subtleties of daily life. As a result, he can still be surprisingly oblivious, caught off guard, or visibly embarrassed by comments, actions, or emotions that others his age would easily understand. These moments make him appear more human and relatable, contrasting with his otherwise confident and capable demeanor. While he is far from emotionless, Matthias is pragmatic and straightforward in his motivations. He openly admits that his decision to support the kingdom is less about personal loyalty or patriotism and more about necessity, since he needs the kingdom to grow stronger so that he can continue his mission and reach the peak of magical excellence. This blend of overwhelming talent, emotional restraint, and unexpectedly innocent reactions makes him a unique and compelling protagonist.

Long ago, the powerful sage Gaias realized he could no longer grow stronger with his First Crest, so he used reincarnation magic and was reborn as Matthias Hildesheimer. When his memories returned at age six, he immediately began training to one day fight the powerful monsters believed to exist beyond the stars.

Because he retains ancient magic knowledge and techniques lost to the modern era, his spells often shock and confuse anyone who witnesses them. At age twelve, he took the entrance exam for the Royal Second Academy and passed as the top student and a scholarship recipient. There, Principal Eduard explained that modern magic theory had become severely flawed and that the academy was in danger. Recognizing Matthias’s unmatched potential, he asked him to help rebuild proper magical knowledge.

Matthias agreed and began reforming magic education alongside the academy’s teachers. Since his presence made non-chanting and ancient magic reforms easier to push forward, he remained registered as a “special scholarship student,” exempt from most classes.

Despite his calm appearance, Matthias has a battle-hungry side and believes that overwhelming strength is the simplest solution to most problems. He also holds grudges against hostile opponents and shows no mercy in battle. Many powerful weapons and facilities he created in his past life still exist, boasting incredible capabilities, though modern mages cannot use them due to their complexity and high magical requirements.

After a successful reincarnation as the third son of the Hildesheimer family, Matthias quickly regained his former abilities. At age twelve, he left his family’s lands to enroll in the Royal Second Academy and continue pursuing greater strength.