Yuga initially appears to be a vain and prideful person, thinking of himself as superior to the rest of his classmates, especially regarding his Quirk. He exhibits extremely flamboyant mannerisms, is fond of posing, and likes to grab the attention of those around him despite frequently getting ignored by his peers. His expression rarely changes from a closed smile, even while he speaks or gets hurt, and he's also prone to getting upset if interrupted or questioned. He also tends to play up his French heritage, occasionally implementing French words into his sentences. However, this persona is shown to be a façade, as Yuga holds severe insecurities and guilt due to the true nature of his Quirk and upbringing. Though he has the desire to have friends, Yuga rarely has the confidence to act upon it. This is initially believed to be due to his insecurities and lack of social skills; he can unintentionally come off as "creepy" to others when he genuinely means well. Instead, he opts to self-isolate, seen through his eating of school meals alone rather than with the members of his class and general avoidance of most social situations. Yuga does possess a compassionate side and is shown to sympathize with Izuku, due to the both of them having what he perceives as highly self-harmful and uncontrollable Quirks, although how he displays this sympathy initially startled Izuku, with the latter unaware that the messages were also subtle cries for help.