In the 'ichigo is grimmjow's pet fanfiction', it could start with Grimmjow capturing Ichigo during one of their intense battles. Grimmjow sees Ichigo as a unique find and decides to keep him around instead of killing him. He puts Ichigo in a situation where Ichigo has limited freedom and has to rely on Grimmjow for basic necessities. As time passes, Ichigo tries to break free from this pet - like status, but also starts to understand Grimmjow's past and the reasons behind his aggressive behavior. This new understanding might lead to a change in their relationship, from a captor - pet dynamic to something more complex and perhaps even an alliance against common enemies.
The main antagonists could be other powerful Hollows who don't like Grimmjow having a human - like Ichigo as a pet. They might see it as a sign of weakness or an abnormal behavior and try to attack Grimmjow to get rid of Ichigo.
In the fanfiction, perhaps they are forced to team up due to a common enemy. As they spend time together, they realize they have more in common than they thought. Female Ichigo might be intrigued by Grimmjow's wild nature, and Grimmjow could be attracted to her strength. They could end up having deep conversations about their pasts and their places in the world, and this could lead to a strong emotional bond between them.
One idea could be that they are rivals in high school sports, like on the track team. Grimmjow is overly competitive and Ichigo is determined not to let him win all the time. Their rivalry gradually turns into an understanding and then friendship, and maybe more as they discover they have more in common than they thought.
Some possible titles could be 'Female Ichigo's Encounter with Grimmjow', 'The Bond Between Female Ichigo and Grimmjow', 'Female Ichigo and Grimmjow: An Unlikely Pair'.
Common themes include the struggle for identity. Ichigo is part - Hollow and Grimmjow is an Arrancar, and they both have identity issues to some extent. Fanfics often deal with how they come to terms with who they are. Another theme is the idea of second chances. Given their initial enmity, fanfics might give them a second chance at a relationship, whether it's a friendship or something more complex. And of course, the theme of power - sharing and cooperation, as they learn to use their powers together in some fanfics.
One possible plot could be that Naruto, after being exposed to some strange chakra or magic, starts to take on Grimmjow's aggressive and fearless attitude. He might become more impulsive in battle, like Grimmjow, and start to challenge his enemies without much thought for strategy at first. His friends would be confused by this sudden change in his behavior.
One possible plot could be that Naruto, through some kind of interdimensional rift or magic, gets access to information about Grimmjow. He is amazed by Grimmjow's raw power and his unyielding attitude in battle. So, Naruto starts to study Grimmjow's fighting style and tries to incorporate some of his techniques into his own. Along the way, he might face opposition from his own village as they don't understand his new - found fascination.
One popular story could be 'Ichigo's Unexpected Bond with Grimmjow'. In this fic, their relationship develops in a unique way, perhaps starting from a fierce rivalry and gradually turning into something more. It might explore how Ichigo's understanding of Grimmjow deepens over time.
I've heard of a fanfic called 'The Blue and the Orange'. In this, the author does a wonderful job of portraying female Ichigo's strength and how it catches Grimmjow's attention. It's set in a post - war scenario where they have to team up against a new threat. It's full of action and also has some sweet moments between the two characters.
In non - lemon fanfiction, their relationship can often be one of mutual respect. They might start as rivals, with Ichigo's strong - willed nature and Grimmjow's aggressive demeanor creating an interesting dynamic. They could gradually come to understand each other better, perhaps through fighting side by side against a common enemy. Their relationship may also involve a sense of friendship, where they learn from each other's different perspectives and ways of fighting.