Well, Hinata could be a support character in the G Gundam universe. Her gentle nature could bring a different perspective to the often - intense Gundam battles. She could be involved in the medical or communication aspects of the Gundam teams, while also having her own character growth as she witnesses the battles and the courage of the pilots.
Gundam Origin serves as a prequel, filling in the backstory and setting the stage for the main Gundam series.
Naruto characters could be inserted as special operatives. For example, Naruto himself could be a one - man army, using his Rasengan as a sort of explosive device in the game's missions. His ability to keep going no matter what could make him a valuable asset in the high - stress situations of Black Ops 2.
He could be a lost soul in Asgard. Maybe he was brought there by some strange magic accident. Since he's neglected, he has to start from the bottom. He could work in the stables or something similar. But then, his true strength starts to show gradually. For instance, when a threat comes to Asgard, his ninja skills, like his shadow clone jutsu, could be the key to saving the day, and he finally gets the recognition he deserves.
He could be a new teacher at Hogwarts. Since he's immortal, he has a vast amount of knowledge and skills. He could teach a new subject that combines ninja techniques and magic. For example, he could teach students how to use their magic in a more physical and combat - oriented way, like ninjas do.
Well, he could be a transfer student. Just like any new character in the Highschool DxD world, Naruto could enter the school and immediately draw attention due to his strange powers and different appearance. His Juubi - influenced abilities would make him a target or an ally depending on who discovers him first.
Naruto could be a new recruit in the Jungle Fury team. He would bring his ninja skills like running on walls and using kunai. His rasengan could be a super - powerful attack against the villains in the Jungle Fury world.
Naruto could be a new student at the Yokai Academy. His presence with the Kyuubi's power would disrupt the balance. For example, the vampires might see him as a threat or a potential ally. He could use his shadow clones to spy on different factions, like the witches or werewolves, to understand the politics of the school better.
Well, Naruto's godlike abilities would likely change the power dynamic. He could easily take on Titans single - handedly. For instance, his ability to transform into the Nine - Tails form would make him a giant - sized threat to the Titans. His chakra could also be used to heal the injured in the Attack on Titan world, which is something they desperately need.
The sharingan ability from Naruto could be integrated into a Gundam x Naruto fanfiction by having a character use it to enhance the Gundam's targeting system. For example, Kakashi could be a Gundam pilot and use his sharingan to quickly analyze enemy movements and weaknesses. The rasengan could also be a part of it. Maybe a character could create a Gundam - sized rasengan as a special attack.
Naruto characters could fit into the FGO lore in various ways. For instance, Naruto's world has different levels of power and abilities, much like the Servants in FGO. His ability to use chakra could be seen as a form of magic in the FGO universe. So, a Naruto character like Kakashi could be a Caster, using his wide knowledge of jutsus as spells.