Katsuki Bakugo is one of the central characters and main deuteragonists in My Hero Academia, defined by his fierce ambition, explosive personality, and relentless drive to become the number one hero. Characterized by his spiky ash-blonde hair, sharp eyes, and aggressive posture, Bakugo possesses the Quirk "Explosion," which allows him to secrete nitroglycerin-like sweat from his palms and ignite it at will. Growing up praised for his powerful abilities, he initially developed an intense superiority complex, leading to a fiery temper, arrogant demeanor, and harsh treatment of others, particularly his childhood acquaintance Izuku Midoriya. Despite his abrasive exterior and frequent volcanic outbursts, Bakugo is exceptionally intelligent, highly observant, and a brilliant battle strategist. As he progresses through U.A. High School, his worldview undergoes significant development; failure and hard-won experiences force him to confront his insecurities, leading to deep personal growth, a stronger sense of teamwork, and a more profound understanding of what it truly means to be a hero who saves people to win.

Izuku Midoriya, also known as Deku, is the passionate and brave protagonist of My Hero Academia. Born without a Quirk in a world full of superpowers, he spent his childhood being doubted and bullied, yet he never gave up on his dream of becoming a hero. Impressed by Deku's innate selflessness and bravery, the legendary hero All Might passes down his own power, One For All, choosing Izuku as his rightful successor. Visually iconic with his messy green hair and freckles, Deku stands out for his brilliant strategic mind and giant heart. As a student at U.A. High School, he works tirelessly to master his overwhelming new power, evolving from an anxious boy into a courageous leader. Driven by a deep empathy for both allies and enemies, Deku's ultimate goal isn't just to defeat villains, but to save people with a smile on his face.