Some fanfictions might depict the Kyuubi eyes as having a mind of their own. They could be constantly communicating with Naruto in a silent way, guiding his actions or warning him of danger. It's like they are a separate entity within him that he has to learn to work with.
Often, in fanfiction, Naruto with Kyuubi's eyes is shown to have enhanced abilities. Writers may show him using the Kyuubi's eyes to see through illusions more easily. They might also describe his vision as being able to detect the slightest movements or changes in chakra flow. His appearance could also change slightly, with the eyes being a central focus. Maybe his pupils become slitted like a fox's, which adds to his overall otherness. This new look could also attract different reactions from characters in the story, from admiration to fear.
Some fanfictions might depict their kiss as a very passionate one, emphasizing the physical aspect. They might describe the intense emotions that lead to the kiss, like a sudden burst of long - suppressed feelings. Others could focus more on the tender and gentle side of the kiss, showing the slow - building love between them.
The emotional depth of their relationship is often explored more in fanfictions. We get to see their insecurities, their hopes, and their dreams regarding their relationship. For instance, Naruto might worry about being worthy of Hinata's love, considering his past as an outcast. And Hinata might fear that Naruto will never see her as more than a friend. These complex emotions are given more room to breathe in fanfictions compared to the original series.
In some fanfictions, Tony's personality might be softened more. He could be shown as being more openly affectionate towards Pepper than in the movies. For example, he might constantly write her love letters or surprise her with romantic gestures. Pepper, on the other hand, could be depicted as more assertive in her own right. Instead of just being Tony's support, she could be a force to be reckoned with in business and even in superhero matters.
In many fanfictions, the aesthetics of fem Naruto's chakra chains are related to her emotions. When she's angry, the chains might glow more intensely and become more jagged in appearance. But when she's calm, they could be smooth and emit a soft, gentle light. Also, the length and thickness of the chains can vary depending on how much chakra she's using. If she's using a lot of chakra, the chains could be thick and long, stretching out far across the battlefield.
In some fanfictions, the Kyuubi's power could be depicted as more spiritual. Instead of just raw chakra, it could have elements of ancient wisdom and spiritual energy that Naruto can tap into. For example, Naruto might be able to use the Kyuubi's power to communicate with the spirits of the past. Another way is to show the Kyuubi's power as having different forms. Maybe there's a 'benevolent' form of the Kyuubi's power that Naruto can access for healing or peace - making purposes, as opposed to the more destructive form we usually see.
On the other hand, Hinata's jealousy is depicted much more delicately. Since she's shy, her jealousy might be shown through her sad looks or small gestures. For example, she might lower her head or have a moment of hesitation when she sees Naruto with another girl. Writers often use her body language to convey her jealousy rather than big, obvious outbursts.
The relationship with the girl Kyuubi could develop in a more romantic way. Naruto's relationship with the regular Kyuubi was mainly about power and control. But with the girl Kyuubi, there could be a lot of mutual understanding and attraction. They might go on dates in the Hidden Leaf Village, sharing their feelings and secrets. Also, she could use her unique Kyuubi - related powers to help Naruto in a more gentle and collaborative manner, rather than just raw power like the regular Kyuubi.
In other fanfictions, their first meeting could be more action - packed. Maybe Peter is chasing a bad guy through the city streets and accidentally crashes into Gwen. They start off on the wrong foot but then quickly realize they have a lot in common. This type of first meeting adds an exciting and different dynamic to their relationship.
Often, they depict very close - knit relationships. The siblings are shown to be extremely loyal to one another. They might have each other's backs in battles, like in a fight against a group of rogue ninjas. One sibling could be in trouble, and the others would rush to save them without hesitation.