Often, it happens when there's a sense of competition or when one friend seems to be progressing faster in life. Maybe they're jealous of their friend's success in love or career.
People might get jealous of their best friend in manga because of insecurities or a fear of being left behind. It could also be due to a perceived imbalance in the friendship where one friend is getting more benefits or recognition.
Jealousy in cartoons often occurs when one character feels they're not getting as much as another. Maybe they want the same power or popularity. Sometimes, it's just a way to add drama and keep the story interesting.
Maybe Uke feels left out or thinks the best friend gets more attention or better opportunities.
It could be because of competition for attention or a guy they like. Girls in comics might get jealous when they feel threatened or left out.
It could be that the manga characters have perfect lives or get everything they want easily, making people envious. Also, their looks or personality traits might be something others long for.
Maybe it's because the content becomes repetitive or doesn't offer enough variety.
Maybe it's because the storylines don't match their expectations or the art style isn't to their taste.
It could be that you see in fictional characters the things you desire but don't have in your own life. For example, their adventures, relationships, or talents.
Maybe they just don't get the style or the story. Different strokes for different folks.
You might get jealous over fictional characters because they represent something you desire but don't have in your real life. It could be their looks, their adventures, or their relationships.
It could be that the art style of the manga is really appealing to you or the themes resonate with your interests. Maybe it offers a break from reality and takes you to an exciting world.