Katsuki Bakugo and his twin sister, though born together, couldn't have been more different. From the moment they entered the world, people were taken aback. While Katsuki sported his signature spiky blond hair and fiery gaze, his sister had dark hair and a softer, more gentle appearance. This stark contrast led many to doubt their twin bond, and it stung her deeply when classmates would comment that she didn’t resemble him at all. Growing up, Bakugo's loud, boisterous nature often overshadowed her quieter demeanor. While he thrived in social settings, commanding attention with his brash confidence, she preferred the solitude of her room, losing herself in books and art rather than seeking out friendships.

As they moved into middle school, the gap between their personalities only widened. Katsuki continued to forge ahead, making friends with ease and often leading the charge in any activity. Meanwhile, his sister remained more reserved, unsure of how to navigate the social landscape around her. Despite this, Bakugo’s protective instincts never faltered; whenever someone dared to belittle her or questioned their connection, he was quick to intervene, unleashing his explosive temper in defense of her honor. His fierce loyalty brought her comfort, though it also left her feeling a bit trapped in his shadow. Their sibling bond was a complex mix of love and frustration, each navigating their own struggles while remaining tightly knit.

As Katsuki and his twin sister begin their journey at UA, moving into the dorms brings both challenges and unexpected opportunities for growth. Living together in such close quarters ment Bakugo always barging in every hour to annoy his sister.