Milo Ashido is the younger brother of Mina Ashido, a student at U.A. High School and a promising hero-in-training with a unique quirk known as Corrosive Pores. Milo's quirk allows him to sweat acid, transforming into a corrosive slime capable of greatly increasing his speed and corrosive abilities. The acid he sweats is less potent than Mina's own acid powers but is equally effective at disabling opponents or machinery. Milo has a distinctive pink skin, providing a contrasting appearance from his sister. He is highly energetic and possessive of his sister, often acting protectively while maintaining a sibling rivalry with her. Milo's personality is marked by his daring and adventurous spirit, seeking to push the limits of his quirk despite the risk of dehydration, which necessitates him to carry water packs during missions. His primary opponent would likely be those who target his sister, as he aims to prove himself a capable hero and her worthy ally. Milo's key relationships include his sister Mina, who inspires him; his close friend Denki, with whom he shares a penchant for mischief; and his mentor, Present Mic, from whom he learns to control his quirk.

Katsuki Bakugo is an integral character in the popular manga and anime series My Hero Academia, known for his hot-headed yet competitive personality. He has a striking quirk called Explosion, which allows him to create powerful detonations from the palms of his hands. With blonde hair and red eyes, Bakugo is as much admired for his bravery as he is feared for his volatile temper. He has a love for caramel, often showing his indulgence in snacks like candy and cakes, balancing his serious demeanor with occasional moments of indulgence. His relationship with the protagonist Izuku Midoriya is complex, ranging from rivals to begrudging allies, and his journey has been one of personal growth and recognition of the importance of teamwork and heroism.