Naruto would probably be in awe at first. He'd try to communicate with Mothra in his usual friendly and exuberant way. He might start by introducing himself and his village, just like he did with other summons. Then he'd try to understand Mothra's powers and how they can be used to help in battles or protect the village.
One possible plot could be that Naruto discovers a new and ancient summoning contract that allows him to summon Mothra. Mothra's appearance in the Naruto universe could cause chaos among the ninja villages as they've never seen such a creature. Naruto would have to learn how to control and work with Mothra to protect his village from new threats.
The exploration of new powers is also great. Since Mothra has her own set of powers, seeing how Naruto or other characters interact with and potentially gain new abilities related to Mothra is really exciting. It could lead to completely new story arcs and battles that we wouldn't see in the original Naruto series.
There is also 'Mothra in the Hidden Leaf'. In this fanfiction, Mothra somehow ends up in the Hidden Leaf Village. Naruto befriends her, and they go through a series of events together, from helping villagers to facing off against some rogue ninjas who want to capture Mothra for their own evil plans.
The theme of protecting the earth also comes up a lot. Since they are both guardians of the earth in a way, fanfics may show them uniting against a common foe that is threatening the planet. This can range from alien invaders to man - made disasters. They are often portrayed as the last line of defense for the earth, and their actions can have a huge impact on the future of the planet.
In a Mothra x Destoroyah fanfic, the story could start with Destoroyah causing chaos in a major city. Mothra senses the danger and comes to the rescue. Their first encounter could be a brief skirmish where they test each other's strength. As the story progresses, the author might delve into the mythology behind both kaiju. For example, Mothra's role as a protector of the Earth and Destoroyah's origin as a more destructive force. This could lead to a complex plot where Mothra tries to find a way to either defeat Destoroyah or find a way for them to coexist.
A Mechagodzilla x Mothra fanfic might explore their different natures. Mechagodzilla, being a man - made weapon of destruction, and Mothra, a symbol of nature and rebirth. The story could be set in a post - apocalyptic world where they have to work together to restore balance. Or perhaps it's a story of how their conflict shakes the very foundation of their world. There could be elements of human interference, like scientists trying to control Mechagodzilla while Mothra tries to protect the natural order.
Obviously, Godzilla and Mothra are the main characters. Godzilla, the powerful and often misunderstood behemoth, and Mothra, the more graceful and often seen as a protector figure.
The contrast between the two characters makes it interesting. Godzilla is a big, powerful and often seen as a more aggressive kaiju, while Mothra is more elegant and has a different kind of power. Their relationship in fanfic can explore different dynamics, like how they might overcome their differences.
A common theme is friendship. The human and Mothra often form a deep bond of friendship that helps them face challenges. Another theme is protection. They usually work together to protect the Earth from other threats like other kaiju.
One common theme is cooperation. Since they are both powerful creatures, in fanfics they often have to work together against greater threats like alien invaders or some super - powerful ancient monsters.