Sakura should be in it. She can provide medical support when Naruto is in trouble due to the One Tail's power. And Sasuke too. His rivalry with Naruto can add an interesting dynamic. Maybe he could be initially skeptical about Naruto's ability to control the One Tail, but later comes to respect his growth.
Obviously Naruto himself. He is the main character and his connection to the One Tail is the core of the story. Kakashi would also be a great addition. His wisdom and experience can help Naruto deal with the challenges related to the One Tail, like teaching him new ways to control it.
Definitely Naruto himself, since it's a drunk Naruto fanfiction. His friends like Sasuke and Sakura should be included too. Sasuke could react in his typical stoic but secretly concerned way when Naruto is drunk. Sakura could be the one trying to get Naruto to sober up or at least stop making a fool of himself. Kakashi would also be great, as he could have some humorous reactions to Naruto's drunken antics.
Well, in addition to Naruto and Urahara, Ichigo from Bleach could be a great addition. Since Urahara has a connection with Ichigo, and Naruto's energetic and positive nature could create an interesting dynamic with Ichigo's more brooding personality.
Kakashi could be a good character to put in. His experience and wide range of ninjutsu could be useful in the story. For Thalia's side, Luke could be included. His conflicted nature and his skills would add a layer of intrigue, especially when interacting with Naruto and Thalia, as they try to figure out whether to trust him or not.
Definitely Naruto himself. His determination and positive attitude can bring a lot to the story. Lala too, of course, with her fun - loving and inventive nature. Sakura could also be a great addition. She could interact with Lala in interesting ways, perhaps learning about Lala's technology and applying some of her medical skills to help Lala if she gets injured.
Madara Uchiha would be an excellent character to include. His long - standing relationship with Hashirama, filled with both friendship and enmity, and his connection to Sasuke and the overall ninja world's history would make for a very engaging fanfiction.
Naruto himself is a must - he's the main character after all. Sasuke could also be great as his rival. Their interactions around the kit would be interesting, like if they both wanted it for different reasons. Sakura could be included too, maybe she helps Naruto figure out how to use the kit.
Definitely Sasuke. His complex relationship with Naruto provides a lot of material for fanfiction. You can explore their friendship, rivalry, and how they grow together. Kakashi is also a great character to include. His wisdom and unique jutsu can add depth to the story. And of course, Sakura. Her growth as a kunoichi and her relationships with Naruto and Sasuke can be interesting to write about.
Definitely Naruto himself. His unique abilities and his never - give - up attitude would add a lot to the story. For Salem's side, Salem herself is a must - include as she is the central figure in her world. Also, characters like Sasuke from Naruto could be interesting as his complex personality and powerful skills would create interesting dynamics. And maybe some of Salem's loyal followers like Cinder could also be included to add more conflict.
Obviously Naruto himself is a must - include. His determination and his never - give - up attitude can add a lot of depth to the story. Also, Sakura from Naruto can be a great addition. She can provide some medical knowledge which could be useful in the story. And for Mikan's side, her friends from her own world like Hotaru can be included. Hotaru's intelligence and her gadgets can create interesting plot points when combined with the ninja world.
Definitely Kakashi. Since he has a connection to both Naruto and Tobi (Obito), his presence can add a lot of depth. He can be the one who tries to bridge the gap between Naruto and Tobi, or he could be a source of conflict as he has his own history with Tobi.