Sasuke's possessiveness can be portrayed realistically through his actions and words. He might not be very vocal about his feelings, but his actions like always staying close to Sakura when Naruto is around or getting irritated when Naruto makes Sakura laugh too much can show his possessive nature. Also, his internal monologues in the fanfiction can give readers an insight into why he feels possessive of both of them.
In fanfiction, Sakura's possessiveness can be portrayed by her constantly wanting to be around Naruto and Sasuke. She might insert herself into their conversations or activities, not wanting to be left out. It's like she feels that she has a special claim on their time and attention.
Show the sudden and uncontrollable nature of his sleep attacks. For example, he could be in the middle of a conversation with Sasuke and suddenly nod off. Also, include the after - effects like grogginess when he wakes up.
Dialogue is also a key way. When they talk, Sakura uses a neutral tone, not the warm or shy tone she used to have. She might say things like 'Sasuke, your actions no longer concern me' which clearly shows her indifference.
Often, in such fanfictions, the relationships can be really out of character. Naruto might be made overly possessive of Sasuke, and Sakura might be pushed to the side as an unwanted third party. But it's important to note that these are just fan - created ideas and not in line with the official Naruto storyline. The lemon aspect usually adds a lot of adult - like romantic and physical elements that are not suitable for all audiences.
Well, there are also fanfictions where Sasuke's obsession is a bit more nuanced. It could start as a grudging respect that slowly turns into an all - consuming love. His actions towards Sakura change over time as his obsession grows, from being aloof to being very attentive and affectionate.
Naruto in fanfic might be shown as even more heroic when facing Akatsuki, like single - handedly taking on multiple members. Sasuke could be more of an anti - hero, having some secret alliance with Akatsuki for a time. Sakura is often made into a more powerful ninja than in the original, so she can better deal with Akatsuki threats. Akatsuki members are sometimes given more backstories and sympathetic traits in fanfic.
In many fanfictions, Sasuke's possessiveness is tied to his deep emotional connection with Naruto. He might feel that Naruto is the only one who truly understands him. So, when Naruto spends time with others, Sasuke can get jealous or possessive. For instance, there are stories where Sasuke gets moody when Naruto is training with other ninja. He doesn't like sharing Naruto's attention. This shows his possessive side in a more complex emotional way.
Sakura's jealousy in these fanfictions can also be expressed through her words. She could make snide remarks about Hinata's relationship with Sasuke. Saying things like 'I don't see what he sees in you' or something along those lines. It adds a lot of tension to the story.
Show his physical symptoms first. For example, he might start having trouble sleeping, lose his appetite, and look constantly tired. This would be an outward sign of his internal turmoil.
A realistic portrayal of Naruto's mental breakdown in fanfiction could involve showing his physical symptoms first. For example, he might stop eating properly and lose weight. His chakra control could also be affected as his mental state deteriorates. He could become withdrawn and not respond to his friends' attempts to reach out, just staring blankly into space.