Interactions with the RWBY characters could also play a big role in his development. If he forms relationships with them, especially with characters like Weiss who come from a noble background, he might start to question his own past and the way he has always carried out his duties. This could lead to a more complex and evolved version of Itachi within the crossover fanfiction.
He could also develop through facing new threats in the RWBY world. The Grimm are different from his usual opponents in Naruto. Dealing with them might force him to adapt his combat style and in turn, grow as a character. For instance, he might have to rely more on others' skills in a team - based RWBY battle scenario.
Sakura's character could develop by becoming more confident. Training with Itachi, who is a highly skilled ninja, would expose her to new levels of combat and strategy. This would make her trust in her own abilities more. For example, she might start taking more risks in battles after learning from Itachi.
Sasuke might develop more patience. Since Itachi is younger in this fanfiction, Sasuke has to be more understanding. He can't be as impulsive as he usually is. For example, he might have to learn to soothe Itachi when he's scared or upset, which helps Sasuke grow into a more empathetic person.
At first, it's likely to be very awkward. Naruto is a very open and energetic person, while Itachi is more reserved. But as they are forced to spend time together because of the arranged marriage, they start to find common ground. For instance, they both care deeply about protecting the village in their own ways.
One interesting concept could be Itachi's Sharingan abilities in the RWBY universe. His visual prowess might be used in unique ways during battles against Grimm. For example, he could use the Sharingan to predict Grimm movements more accurately, similar to how he reads his opponents in the Naruto universe.
Sakura's character could develop in terms of her understanding of the ninja world. Itachi and Shisui have different outlooks compared to her. Through training with them, she might gain new perspectives on things like loyalty, sacrifice, and the greater good in the ninja world, which in turn shapes her character.
In many fanfictions, Sasuke starts as a character full of anger and a thirst for revenge. But in the context of a relationship with Itachi, he begins to soften. He starts to see Itachi in a different light, beyond just the person who killed their clan. Itachi, on the other hand, is often portrayed as a complex figure with many secrets. In these fanfictions, his love for Sasuke makes him more vulnerable and human. For example, in some stories, he reveals his true motives to Sasuke, which changes their dynamic.
His possessiveness could be seen in his actions towards Sakura. He may be overly protective, like not allowing her to go on dangerous missions alone. He would always want to be the one to accompany her, ensuring her safety at all times. This shows that he doesn't want to share her with any potential threats that could come her way during a mission.
Writers often give more depth to Itachi's internal struggles. They might show his conflict between loyalty to the village and his love for his family in more detail. For Sasuke, they may explore his growth in a different way, like how he would handle power if he had Itachi by his side earlier. They also use dialogue to show their evolving relationship, with Itachi giving Sasuke more wisdom and Sasuke learning to trust his brother again.
Naruto's character development in this fanfiction scenario would be multi - faceted. Firstly, his relationship with Itachi would be a major factor. He'd respect Itachi more and perhaps see him as a mentor. As he trains in the Sharingan, he'd learn discipline in a new way, different from his training with Jiraiya. His interactions with other characters, especially those who are wary of the Sharingan's power, would change. He might have to prove that he can use this power for good. His growth would not only be in terms of combat skills but also in his maturity and how he views the ninja world as a whole.
His understanding of the Uchiha and the darker side of the ninja world would deepen. Itachi would share his experiences, and Naruto would gain a more nuanced view. This might make him more empathetic towards enemies. Also, his combat skills would diversify. He could incorporate Itachi - like precision and speed into his fighting style, becoming a more well - rounded ninja.