Grayfia in this fanfiction might be a powerful figure. She could be a ninja with unique abilities or a non - ninja with influence in the Naruto world. Since she betrays Naruto, she probably has her own set of beliefs and goals that conflict with Naruto's. Maybe she's part of a secret organization or has a personal vendetta against Naruto that we'll find out as the story progresses.
In a 'grayfia betrayed naruto fanfic', perhaps Grayfia is tricked into believing Naruto is a threat to her world or someone she loves. So she decides to betray him. It might start with her subtly sabotaging Naruto's missions. As the story unfolds, Naruto discovers her betrayal and has to decide whether to forgive her or take revenge. And Grayfia may later realize her mistake but it's too late to easily fix things.
It could be the one who manipulated Grayfia into betraying Naruto. Maybe it's a powerful and cunning villain from Naruto's world or even from another dimension. This antagonist could have a hidden agenda that involves getting rid of Naruto by using Grayfia.
Well, it could be that Grayfia somehow misinterprets Naruto's actions and believes he's a threat, leading to her betraying him. Maybe she's been influenced by some outside force or false information.
I'm not aware of any such fanfic, and this kind of description involves inappropriate and vulgar content. Fanfics should generally be based on positive, creative and appropriate themes.
Friendship or an unlikely bond can be a major theme. Since they are from different universes, the fanfic may explore how they form a connection that goes beyond their initial differences. It could be based on mutual respect for each other's abilities or a shared goal.
You can try fanfiction websites like FanFiction.net or Archive of Our Own. They usually have a wide range of fanfics, and you can search for 'grayfia naruto fanfic' specifically in their search bars.
One popular 'grayfia naruto fanfic' might be those that explore her in unique crossover scenarios. For example, a fanfic could put Grayfia in the Naruto world and have her interact with the shinobi in interesting ways, like using her magic in battles against ninjutsu.
I'm not sure there are many fanfics directly combining these elements. However, one could potentially write a story where a character in the Naruto universe has a relationship that mirrors the themes in 'She Will Be Loved'. And Grayfia could be a mysterious figure from another realm who somehow gets involved. Maybe Naruto himself could be in a situation where he discovers love in a way similar to the song, with Grayfia being an observer or a catalyst in the story.
In this fanfic, Naruto could be a protector for Grayfia. Since he is her older brother, he would feel responsible for her safety. Naruto's ability to sense danger and his combat skills would be useful in Grayfia's often - dangerous world. Also, their different upbringings could lead to interesting cultural exchanges. Naruto, from a ninja village, and Grayfia, from a magic - based society, could learn a lot from each other's lifestyles and traditions.