Death happens. It is a fact of media and life. Anime tends to be one of the places where death is typically treated with the most seriousness, with lots of added dramatic effect. It's one of those things that anime fans collaborate on in whispers, talking about which characters made the biggest emotional impact on them and which ones they could see coming a mile away. Every fan has that one character that made them rethink whether they would even bother finishing a series. It's a badge of honor to be able to recount the moments that truly devastated them, and a game to introduce the particularly memorable ones to their non-anime-acquainted friends in order to watch the chaos from the outside.
Source：https://www.cbr.com/shonen-death-flags-how-to-notice/
