In recent times My Hero Academia has been growing in popularity, bridging the gap between Shounen and American
Deku x Bakugo
Deku relationship with Bakugo is not well established.
Growing up, Bakugo bullies Deku. We never see any positive interaction between both characters.
Even in Highschool, whenever Deku tries to reach out for Bakugo, he always reacts aggressively towards Deku.
It’s not until after their confrontation over All Mighty powers, that we actually see a somewhat friendly approach from Bakugo. But up to that point, their relationship is mostly defined by bullying. Which makes it hard to understand why Deku cares for Bakugo as a friend.
Naruto x Sasuke
Both Naruto and Sasuke initially hate each other, Naruto is envious of Sasuke and his standing in school. While Sasuke looks at Naruto with disdain.
However, they are forced to interact through missions, and we see them grow to respect each other by overcoming hardships together.
By the time the series sets the conflict between Naruto and Sasuke, we already saw both characters relationship grow. So it’s easy to understand why Naruto is set into saving Sasuke. Because, despite their conflicts, they were the only ones who truly ever understood each other.