Well, Naruto and his team are the obvious choices. But also, there could be a young monster who is curious about the ninjas and wants to help them. This monster could be a bit of a misfit among its own kind. And from the alien side, a female alien scientist who is conflicted about the invasion. She might secretly help Naruto and the monsters because she realizes the value of the Naruto world's chakra and doesn't want it to be exploited by the more war - hungry aliens.
In addition to the regular Naruto characters, some of the more powerful monsters could be main characters too. For instance, a giant dragon - like monster that has the power of flight and can breathe ice. It could be a reluctant ally at first but then grow to respect Naruto and his friends. And among the aliens, there could be a leader - type character who is extremely intelligent and has unique powers that pose a great threat to the Naruto world.
In a 'Naruto Monsters vs Aliens' fanfic, perhaps the aliens are trying to enslave the people of the Naruto world. The monsters, which were once feared by the villagers, now become unexpected allies. Naruto, with his belief in friendship and understanding, tries to bridge the gap between the two groups. He might train with the monsters to learn new combat techniques and in turn, teach them about the importance of unity. Together, they could fight against the aliens' mind - control devices and save the world.
The main characters include Susan Murphy, who becomes Ginormica. There's also The Missing Link, B.O.B., and Insectosaurus. And of course, the alien villain Gallaxhar.
Well, in the 'Monsters vs Aliens' novel, Susan is a very prominent character. She becomes Ginormica after being hit by a meteor. B.O.B is really interesting, he's just this blob - like creature who is very friendly and always seems to be in a good mood. Dr. Cockroach is a character with a lot of quirkiness. He was a scientist who had some experiments go wrong and turned into a monster. And The Missing Link adds a prehistoric touch to the group of main characters.
The Missing Link is also quite popular. His brash and confident personality can add a lot of humor and action to a fanfic. He could be on a quest for glory or trying to prove himself to the other monsters.
In a fanfiction, the aliens could capture Naruto and try to study his unique abilities. The monsters then decide to rescue him because they realize his powers could be the key to defeating the aliens once and for all. The story could involve a lot of action as the monsters infiltrate the alien base to save Naruto.
In Naruto Monsters vs Aliens fanfiction, it's hard to say who would win. Naruto's monsters have unique ninja abilities like chakra control and powerful jutsus. However, aliens might have advanced technology and strange powers. If the aliens' technology can disrupt chakra, they could have an advantage. But Naruto monsters are used to fighting in their own world's crazy battles.
Naruto's ability to sense danger and his strong willpower could also play important roles. In the Monsters vs Aliens world, there are often unexpected threats. Naruto's danger - sensing ability would help the team anticipate attacks. And his willpower could inspire the monsters when they are facing difficult situations. His ninjutsu skills in general could be combined with the unique features of the monsters, like using the Invisibility of the Invisible Girl and adding his own hidden mist jutsu to create an even more effective stealth attack.
One idea could be a story where the monsters and aliens have to team up against an even greater threat from another dimension. Maybe a powerful interdimensional being that wants to conquer both Earth and the alien planets.
An old grandfather who lives in the house could be a main character. He has a lot of stories and wisdom. Maybe he has had some previous encounter with aliens when he was young and now he can help the family deal with the situation in the attic. He could be the one to bridge the gap between the humans and the aliens.
The plot involves a group of monsters coming together to fight against aliens. Susan becomes Ginormica and teams up with the likes of B.O.B, Dr. Cockroach, and The Missing Link to save the world from the alien threat.