As an emotionless ANBU in a Bleach fanfiction, Naruto might serve as a balance. The Bleach world is full of intense emotions, especially among the characters like Rukia and Ichigo. Naruto's lack of emotion could contrast sharply with them. He could be used to keep the more impulsive characters in check. Maybe he'd be assigned to protect a key location in the Soul Society, and his emotionless state would make him immune to any bribes or threats from the enemies. He'd just coldly execute any threats that come his way.
He could be a sort of enigma. His role might be that of a lone wolf, going on solo missions that require stealth and quick decision - making without the interference of emotions. For instance, he could be sent to infiltrate a group of Hollows or a rogue Soul Reaper faction.
Well, if Naruto were an emotionless ANBU in a Bleach fanfiction, he might be a really efficient fighter. He'd probably approach battles in a very cold and calculated way, like how ANBU are supposed to be. Maybe he'd cross paths with some Bleach characters and they'd be quite shocked by his lack of emotion. For example, Ichigo might initially mistake him for an enemy with his stoic demeanor.
One key element could be Naruto's internal struggle. In an emotionless state as an Anbu, he'd have to deal with his past self. His ninja skills would likely be more cold - efficient. Another element might be his relationships. His friends would be confused by his new demeanor. For example, Sasuke might sense a change and be both curious and cautious. Also, the Anbu missions themselves would be interesting. He'd be sent on stealthy and dangerous tasks, and his emotionless state could be both an asset and a hindrance, like not being able to fully understand the motives of the enemies due to lack of emotional intuition.
Well, if Naruto is emotionless in this fanfic, his relationship with Sasuke would be drastically different. There would be no intense rivalry based on emotions like in the original Naruto. In the Bleach world, his relationship with Ichigo might be more of a power - centered one. Since Naruto doesn't feel emotions, he might only see Ichigo as a means to an end, like a source of power or a tool to achieve his goals in this new crossover world.
With his Anbu comrades, Naruto's emotionless state would create a sense of distance. They would find it hard to trust someone who doesn't show any emotions. However, some might respect his cold - efficient way of handling missions. In the long run, if he doesn't change, he might be isolated within the Anbu ranks, as relationships in the Anbu are also based on some level of mutual understanding and emotional connection.
His role could be that of a teacher. Since he doesn't have emotions clouding his judgment, he could teach the Fairy Tail members about self - control and the importance of thinking rationally. He could show them how to use their magic more effectively without being carried away by emotions like anger or pride. He might also introduce them to some ninja techniques that are based on discipline rather than raw emotion.
There could be a plot where Naruto's coldness is a result of a traumatic event in the Anbu. Maybe he witnessed something so horrible that he shut down his emotions to cope. And the story could revolve around him either slowly opening up again or becoming even more detached as he delves deeper into Anbu work. Plotlines might also involve him taking on extremely dangerous missions that only someone with his newfound coldness can handle, and how that affects his standing within the Hidden Leaf Village.
As an Anbu Commander, Naruto would bring a new sense of hope and purpose. His godlike nature might make him more empathetic towards the Anbu members. He could understand their pain and struggles better, and thus be able to guide them more effectively. He might also use his powers to heal any physical or mental wounds they have, creating a more united and efficient Anbu force.
His relationships take a big hit. His friends like Sakura and Shikamaru would find it hard to connect with him. Sakura, who's used to Naruto's warm and often goofy self, would be at a loss. Naruto's lack of emotion means he won't show the same level of care or enthusiasm towards her. With Shikamaru, their conversations would be very different. Shikamaru is used to Naruto's emotional outbursts and quick decisions based on feelings. Now, Naruto would be more reserved and logical, which could strain their friendship.
One possible storyline could be Naruto being sent on a top - secret mission as an Anbu. Due to his emotionless state, he approaches the mission with cold - blooded efficiency, making him a formidable but somewhat terrifying figure among his comrades. His lack of emotion might lead to some interesting interactions where others try to figure out what's wrong with him.
One idea could be that Naruto, in this fanfic world, is emotionless due to some dark magic. In the Bleach universe, he could be a rogue soul reaper who doesn't follow the normal rules because of his lack of emotions. For example, he might befriend Ichigo but in a very cold and calculating way, using Ichigo's power for his own ends without really feeling any guilt or friendship in the true sense.