Yuga Aoyama trains as a Pro Hero in U.A. High School's Class 1-A under the alias "Shining Hero: Can't Stop Twinkling." He projects an extravagantly flamboyant and prideful persona, peppering his speech with French phrases and striking dramatic poses. This showmanship masks deep-seated insecurities about his Quirk's limitations and unnatural origin. He maintains a constant smile even in distress and often breaks the fourth wall by addressing the audience directly. Born Quirkless, Aoyama acquired his "Navel Laser" Quirk via a deal his parents struck with the villain All For One. This power lets him shoot concrete-piercing energy beams from his navel, which can also propel him through the air. However, the artificial Quirk causes severe intestinal distress with extended use, initially restricting him to one-second bursts. A specialized support belt mitigates this by channeling the laser's energy and activating auxiliary emitters on his shoulders and knees. Training at U.A. increased his stamina, yet low pain tolerance and physical fragility persisted as obstacles. His combat style emphasizes long-range support through techniques like "Navel Buffet Laser" (multi-directional beams), "Navel Saber" (energy blade), and "Can't Stop Twinkling: Supernova" (a charged, high-destructiveness blast). Academically, he ranks 18th in Class 1-A and shows modest physical abilities, placing 14th in the Quirk Apprehension Test. Direct combat proves challenging, evidenced by his loss to Mina Ashido in the U.A. Sports Festival. He compensates with tactical ingenuity, such as redirecting his laser through Toru Hagakure's refraction during the license exam or creating diversions to assist allies. Aoyama values self-sacrifice, notably drawing enemy fire to protect classmates during critical missions. Coerced into spying for All For One under threat to his parents' lives, Aoyama leaked U.A. intelligence, including the training camp location. He wrestled with guilt while developing authentic bonds with classmates. His internal conflict climaxed at Kamino Ward when he defied orders to attack Mr. Compress and save Katsuki Bakugo. All For One’s imprisonment seemed to end his ordeal, but the villain’s escape revived the threat. Class 1-A confronted him after his betrayal was revealed but forgave Aoyama upon learning of the coercion. In the final war, he defied All For One by aiding Izuku Midoriya in delivering a decisive strike, proclaiming the villain’s fear of "hope and light." Post-war, he surrendered to authorities but received a pardon due to extenuating circumstances and his heroism. He later secured a provisional hero license and now pursues redemption alongside peers. Aoyama shares a unique bond with Midoriya, identifying with their shared struggles of self-damaging Quirks and initial exclusion from hero society. This kinship led him to secretly seek Midoriya’s guidance, though his awkwardness rendered these encounters unsettling. He maintains camaraderie with Ashido and Denki Kaminari, though isolationist tendencies lingered until his secrets surfaced. Standing 168 cm tall with a slim build, blonde hair, and purple eyes, Aoyama has delicate features. His hero costume merges functionality and theatrics: a bluish-black armored suit paired with a glittering indigo cape, red wing-shaped visor, and signature support belt. Early concept art depicted similar designs with longer hair and bell-bottom pants. Beyond heroics, he relishes cheese and self-referential humor, often unsettling others by gazing straight at viewers or cameras. His name translates to "elegant blue mountain," reflecting his crafted persona.