Matteo is the protagonist of the anime Necromancer Isekai: How I Went from Abandoned Villager to the Emperor's Favorite. Originally an ordinary villager in his past life, he dies and is reincarnated into a fantasy world, where he is taken in by Duke Lawrence and given the name Matteo. He later becomes the grandson of Duke Lawrence's grandfather, the Marquis, and is raised in a noble household where he is doted on by his powerful grandfather.

Matteo possesses immense magical power that is greater than anyone else in the country's history. This power is awakened when he touches a dragon egg he received as a gift, causing the egg to hatch and marking the beginning of his extraordinary abilities. He names the dragon Eva and tames it. As he delves deeper into magic, he revives ancient spells and successfully pulls the legendary sword Excalibur from its sheath, a weapon that absorbs magic and enhances his already formidable abilities. His magical prowess and skill with ancient arts make him one of the most powerful figures in the kingdom.

In terms of personality, Matteo is shown to be someone who is charming and capable, quickly earning the favor of those around him. He takes a liking to the Emperor after meeting him, though he is unaware that the Emperor harbors a massive secret. He is surrounded by companions such as Ishtar, Hecate, and Metis, who support him on his journey. His relationship with Ishtar is noted to be one of deep affection, with Ishtar showing great care for him. Throughout the story, Matteo transitions from an abandoned villager to a central figure in the empire, driven by his growing power and the bonds he forms with those around him. His development is marked by his mastery of necromancy and ancient magic, as well as his role in uncovering the secrets of the Emperor and the world he now inhabits.