His friends from the village, like Shikamaru, would be intrigued. Shikamaru, being the strategic thinker, would start to consider all the possibilities of how Naruto could use the ring for the benefit of the village. Choji might be excited and ask Naruto to show him some cool tricks with the ring. And Ino would likely be thinking about how Naruto's new power could change their relationships and the balance of power in the village.
Iruka - sensei would be proud yet concerned. Proud that Naruto has this new and amazing power, but concerned about how Naruto will handle it. He might give Naruto some advice on responsibility, much like he did when Naruto was learning to be a ninja. His other friends like Kiba and Hinata would also have different reactions. Kiba might be a bit envious at first, but then get excited to see what Naruto can do. Hinata would be shy as usual, but secretly hope that Naruto uses this power for good and stays safe.
Sakura would probably be both amazed and a bit worried. Amazed because Naruto always seems to get into these extraordinary situations, but worried about what new dangers this Lantern Ring might bring. Sasuke, on the other hand, might be initially skeptical. He'd want to see what Naruto could actually do with the ring before he gave any real reaction.
When Naruto's friends see him with the Spartan armor, it would cause a stir. They would all gather around, asking questions. Some would be excited about the new possibilities it presented, while others might be worried about where it came from and if it was dangerous. Naruto would have to explain what he knew about it, and they would all start brainstorming about how they could use it in their future battles or missions. They might also have to deal with any jealousy or envy that could arise if the armor seemed to give Naruto an unfair advantage.
Sakura might be shocked at first, but then she'd be really happy for Naruto. She'd probably be more protective of him too, especially if there are any threats related to his heritage. After all, she's always cared about him in her own way.
Sasuke would be more aloof about it. He might not show much interest on the surface, but secretly he'd be observing Naruto's every move. If there was something in the base that could help him in his quest for power, he'd definitely be interested.
Shikamaru would be annoyed at first, thinking that Naruto has gotten them into another troublesome situation. But he would soon realize the potential benefits of having the baby dragon around, like using its abilities for strategic purposes in battles or for the overall protection of the village.
His village, Konoha, would be in shock. The ninja council would probably gather immediately to discuss this strange phenomenon. Some might think it's a new threat, while others could see it as an opportunity for new knowledge. The villagers would be both scared and curious, looking to Naruto for answers since he was the one who found it.
His friends from Team 7, like Kakashi, would feel responsible for Naruto's situation. Kakashi would likely use his resources to find a proper shelter for Naruto. Shikamaru and the others might come together to form a sort of support group for Naruto. They would pool their resources, like money and food, and also try to cheer him up by sharing stories and jokes.
Well, if Naruto finds a Lantern Ring, he might initially be confused. He's from a world of ninjas and chakra, not the DC Universe's power rings. But being Naruto, he'd likely adapt quickly. Maybe he'd use the ring's power to enhance his ninjutsu, like making his Rasengan even more powerful. He could also use it to travel faster between villages, kind of like how Green Lanterns can fly across galaxies.
Sasuke, who has his own complex relationship with Naruto, would probably be in denial at first. He's seen Naruto as this strong - willed person, and the idea of him having schizophrenia would be hard to accept. But as time goes on, he would become more protective. He might train Naruto in ways to control his mind during the episodes, using his own experiences of mental discipline. As for Kakashi, he would be empathetic. He has his own traumas, and he would do his best to support Naruto, maybe sharing his own stories of dealing with difficult mental states.
Naruto would probably be very kind and protective. He knows what it's like to be alone as a child, so he'd do his best to make the child feel safe and loved.
Sakura might be initially shocked and heartbroken. She has been Naruto's friend for a long time, and his sudden departure would leave a big hole in her life. She might try to convince him to stay at first.