Naruto's character would gain a new sense of responsibility. As a Green Lantern, he'd have to abide by the Corps' rules and uphold justice on a much larger scale. This might make him more serious at times, but his core of being a fun - loving and determined person would still remain. He'd also learn to work in a team with other Green Lanterns, which could be different from his experience with his ninja teams as they come from diverse backgrounds.
He would become more confident in his abilities. The Green Lantern ring gives its wielder a sense of power and purpose. Harry, who has always had self - doubts, would grow into a more self - assured person.
His already positive personality would become even more so. He'd be like a beacon of hope. He might be more focused on bringing out the best in others, since that's what Blue Lanterns do.
Naruto's personality would adapt to fit the new role. His existing positive traits like his courage and his ability to make friends would help him in the Green Lantern Corps. He'd be more of a team player perhaps, learning to work with beings from all over the universe. His impulsive nature might still be there, but he'd learn to control it better with the discipline that comes with being a Green Lantern. And his overall goal would shift from becoming Hokage to being a great Green Lantern and protecting the cosmos.
Naruto's character could develop in many ways as a Green Lantern. His understanding of power would change. He'd go from relying on chakra and ninja techniques to using the power of the Green Lantern ring. This would force him to be more creative in combat and problem - solving. His view of the world would also expand beyond his ninja village. He'd start to see the bigger picture of the universe and his role in protecting it, which could make him more mature and responsible.
Naruto's perception abilities might improve. The Green Lantern ring gives the user access to a lot of information. He could use this to detect enemies more easily, similar to how he uses his sage mode to sense chakra. Also, his ability to communicate and connect with others could be different. He might be able to use the ring to communicate across long distances, which would be useful in both his ninja world and in any Green Lantern - related scenarios.
His mobility would be enhanced. He could fly around like Green Lanterns do, which is a huge change from his normal ninja running and jumping. He could also use the ring to create shields, protecting himself from attacks that his ninja gear might not be able to handle.
Naruto as a Green Lantern would bring a whole new dynamic. His never - give - up attitude is something that the Green Lanterns value. He would probably try to use the power of the ring to bring peace not just to his new world as a Green Lantern but also find a way to connect it to his old ninja world. He might create constructs that are inspired by his friends and sensei back in Konoha, like a construct of Iruka - sensei to inspire him during tough battles.
He'd become more responsible for the whole world perhaps. Since the Avatar has to keep balance everywhere.
Naruto's character would likely become more patient. Dealing with Pokemon, which are different from his usual ninja foes, would require a different approach. He would have to understand their behaviors and needs, which would make him more patient and empathetic. Also, his leadership skills from the Naruto series would be enhanced as he might lead groups of Pokemon trainers in this fanfiction world.
In a fanfic where Naruto becomes a Green Lantern, he would bring his ninja skills and unwavering determination to the Green Lantern Corps. His ability to never give up, which is a big part of his ninja nature, would make him a formidable Green Lantern. He could use his chakra control in unique ways with the power ring. For example, he might combine his Rasengan with the constructs created by the ring, making for some really powerful and creative attacks.