There's the 'lost in time' trope that can be used in fanfiction about James Potter's little sister. For instance, she might get sent back in time and has to interact with the younger versions of her family members. This trope allows for a lot of interesting character development as she has to navigate this new situation without revealing too much about the future. It also gives the author a chance to explore different eras of the wizarding world through her eyes.
One common trope is the overprotective James. He's always looking out for his little sister and getting into trouble when someone messes with her. For example, in many fanfics, if someone teases her, James is quick to hex them. Another trope is the sister having a special power that no one else in the family has, like being able to communicate with magical creatures in a unique way.
One common theme is family. Since she's James Potter's sister, her relationship with her family, especially James, is often explored. It could be about how they support each other or have sibling rivalries. Another theme is identity. She has to figure out who she is in the shadow of her famous brother. For instance, in some fanfictions, she tries to make a name for herself independent of the Potter name.
One great fanfiction about James Potter's little sister is 'The Potter Sibling Bond' on FanFiction.net. It delves deep into her relationship with James and how she copes with the family legacy. It has a really engaging plot that keeps you hooked from start to finish.
One common trope is the over - protective Peter. He's always worried about his sister getting involved in his dangerous superhero life. For example, in many fics, he'll try to keep her away from any situation that might put her in harm's way.
Another trope is the little sister having some sort of special ability. Maybe she can communicate with the creatures from the other dimension, or she has some psychic powers that help in the fight against the bad guys. It adds an extra layer of intrigue to the story. In a lot of these fanfics, this special ability also causes some tension between her and Steve as he tries to keep her safe while she wants to use her powers for good.
She might have been lured into a trap by a dark wizard who was after the Potter family. The dark wizard could have used her as a bait to get to James or his parents. Another way could be that she was suffering from a mysterious magical illness that couldn't be cured in time. This would add a sense of helplessness to the situation as everyone around her tried their best but still couldn't save her. It could also be that she got lost in a dangerous magical place like the Forbidden Forest and couldn't find her way out, ultimately meeting her end there.
One common theme is family. Since she's James Potter's sister, there's often exploration of her relationship with James, their parents, and the rest of the family. Another theme is identity. She has to figure out who she is within the shadow of her famous brother. For example, in some fanfics, she might struggle to find her own place in Hogwarts or in the wizarding world in general.
One common theme is family. Since she is part of the Potter family, stories often explore her relationship with James, her parents, and other family members. For example, how she deals with the expectations that come with being a Potter.
One possible storyline could be that James Potter's little sister is a bit of an outcast in the wizarding world because she doesn't have the same brash and popular personality as James. Maybe she's more into books and research. She could struggle to find her place among the Gryffindors who idolize her brother. Another could be that she has a special power that she's afraid to show because she doesn't want to be compared to James all the time. And she might form an unlikely friendship with someone from a different house, like a Ravenclaw, who helps her explore her own identity away from her brother's shadow.
Friendship is also a big theme. She forms her own group of friends at Hogwarts and these relationships help shape her character. In some fanfictions, there's a theme of rivalry too. Not in a negative way always, but a friendly rivalry with James or other students in terms of magical achievements. These themes all come together to create an interesting and complex story.
One common theme is family. Since Sirius comes from the Black family, his sister's relationship with her family and how it impacts her connection with James Potter is often explored. For example, the Black family's pure - blood mania might create conflict or a sense of alienation for her.