The foundation of Kacchako was laid during the , specifically Chapter 36 of the manga and Season 2, Episode 9 of the anime. While the stadium crowd booed Bakugou for being "brutal" against a "frail girl," Bakugou famously refused to go easy on Uraraka. He recognized her as a legitimate threat, famously stating that nothing about her was "frail". This moment is pivotal for several reasons:

: Fans point out that Uraraka is one of the few students who isn't intimidated by Bakugou, often teasing him or calling him out on his behavior. A Fandom Giant

In the world of My Hero Academia fandom, few pairings spark as much debate and creative energy as . This "ship," which pairs the explosive Katsuki Bakugou with the bubbly Ochaco Uraraka, has become a cornerstone of the community, known for its "Grumpy x Sunshine" dynamic and deep-seated mutual respect. The Catalyst: The Sports Festival