Yuuto is overall an upbeat person and cares deeply for his comrades. He's also a very polite and friendly individual, even considering Issei's initial dislike towards him. As a Knight, he has pride, chivalry, dignity, and honor befitting one, and is shown to enjoy fighting fellow swordsmen like Karlamine.

Initially, he had a deep hatred towards the Holy Swords or their wielders. But the efforts of the Occult Research Club members during Volume 3, and the souls of his deceased friends, who died 