Another instance could be in a scenario where the reader is a new member in the Survey Corps and is very skilled. The others start to praise the reader a great deal, and Mikasa, being used to being one of the top soldiers, feels a twinge of jealousy. She may then challenge the reader to various tasks to prove herself better.
There might be a fanfiction where the reader has a special connection with Levi. Mikasa, seeing their closeness, becomes jealous as she feels the reader is taking away someone she respects. She could start to act distant towards the reader and secretly observe the reader's interactions with Levi.
One example could be a story where the reader is getting a lot of attention from Eren. Mikasa, who has deep feelings for Eren, starts to feel jealous of the reader. In this fanfiction, Mikasa might start to give the reader cold looks or try to keep the reader away from Eren subtly.
The jealousy can be shown through Mikasa's actions. For example, she might become more withdrawn when the reader is around. She could avoid eye contact or simply not engage in conversations with the reader as much as she does with others.
One good example could be a story where Sasuke is getting a lot of attention from a new female character in the village. Sakura becomes jealous seeing them interact so often. In the fanfiction, Sakura might start to distance herself from Sasuke, which makes Sasuke wonder what's wrong. Eventually, he realizes it's because of his interactions with the other girl and has to work to regain Sakura's trust.
One great example is 'A Jealous Heart' where Draco's jealousy over Hermione's friendship with Harry leads to some interesting confrontations. It's filled with tension and a slow - burn relationship development.
One good example could be a story where Marinette gets jealous when she sees Adrien getting too close to another girl at school. The writer might explore her inner turmoil and how she tries to deal with these new feelings while still being Ladybug.
One good example could be a story where Naruto is getting a lot of attention from other female characters. Hinata sees this and starts to feel jealous. She might try to be more assertive in showing her feelings for Naruto. For instance, she could start leaving him little gifts or notes to remind him of her presence. Another example could be a situation where Naruto is training with a new female teammate who is very skilled. Hinata's jealousy drives her to train harder herself so she can be at Naruto's level.
A good Sonic gets jealous fanfiction could be one where a new, flashy male character comes to town. Amy is immediately intrigued by his charm. Sonic, seeing this, becomes jealous. He tries to show off more than usual, like running at his top speed all the time or doing flips in front of Amy. But Amy is oblivious at first, which only makes Sonic's jealousy grow. Eventually, Sonic has to confront his feelings and either admit his jealousy or find a more mature way to handle the situation.
One great mikasa x reader fanfiction is 'A Bond Beyond Walls'. It beautifully portrays the relationship between Mikasa and the reader in a post - apocalyptic setting. The story focuses on how they rely on each other for survival and gradually develop deeper feelings.
One popular example could be 'The Magic School Bus' fanfiction where the child reader can be imagined as a new student on the bus, going on all those wild adventures. Another might be a 'Harry Potter' - themed child reader fanfiction where the reader is a young wizard starting at Hogwarts. There are also 'Percy Jackson' fanfictions where the child reader could be a demigod joining Camp Half - Blood.
A great fanfiction in this regard might involve Serena getting jealous when Ash is constantly talking about a famous Pokemon coordinator. She starts to doubt her own skills and her place in Ash's life. As the story unfolds, she realizes that her jealousy is unfounded and that Ash values her in a unique way. This type of fanfic often plays on Serena's insecurities and her deep feelings for Ash.
One good example could be a story where Levy sees Gajeel talking to another girl at the guild. She starts to feel jealous and acts a bit cold towards him. Gajeel, not realizing at first, then misses Levy's usual warm attitude and when he figures it out, he has to work hard to make it up to her. The 'lemon' part could be when they finally reconcile and there are some passionate, romantic scenes between them.