Lancelot is a Holy Knight and a member of the special service organization known as the Knights of Round, serving under the command of Arthur. He presents a harsh and foul-tongued exterior toward Arthur, but inwardly he genuinely understands Arthur's feelings and intentions. Lancelot is stubborn and maintains this abrasive attitude as a facade to hide his deeper loyalty and concern. Despite his gruffness, he shows care and consideration for the students of the academy as well.

A skilled and proud swordsman, Lancelot has earned the title Lightning Knight due to his exceptional combat abilities. He wields a unique weapon called a driver, specifically the gun-chakram type named Aroundight, which he uses in battle. Beyond swordsmanship, he possesses a special power that allows him to summon a set of gears which increase his speed and precision. He also has a connection to the divine power of the Arthurian legend, granting him additional unique abilities.

Lancelot is driven by a personal motivation: his younger sister, Elaine, was kidnapped by a mysterious organization, and he has been tirelessly searching for her ever since. This quest to uncover what happened to his sister fuels his determination and pushes him to join the others in their journey toward the Divine Gate. His relationships are defined by his loyalty to Arthur and his fellow knights, though his stubborn nature often masks his emotional depth. Throughout the story, Lancelot serves as a supporting member of Arthur's group, contributing his combat prowess and unwavering resolve. His development largely involves maintaining his pride as a knight while slowly allowing his genuine compassion to show through his rough exterior.