The relationship could be one of mutual discovery. The little girl might have a unique perspective on things that makes Supergirl see the world in a new light. And Supergirl, with her super - hero status, can introduce the little girl to a world of possibilities. They could start off as strangers, but as the story progresses, they form a deep bond. For example, the little girl might be an artist and she draws pictures of Supergirl that make Supergirl realize how she is perceived by the public. This can lead to Supergirl having more self - awareness and in turn, she helps the little girl gain confidence in her art.
Power Girl and Supergirl in fanfiction can have diverse portrayals. Their relationships with other characters, like Superman or other members of the Justice League, can greatly influence how they are presented. If in a fanfic they are both part of a team, they might have to learn to cooperate despite their differences. Power Girl's experience and Supergirl's eagerness can create an interesting dynamic. Additionally, their origin stories can be tweaked in fanfiction. Some might explore how Power Girl's different origin in an alternate Earth affects her personality and actions compared to Supergirl's more traditional Kryptonian origin.
The relationship can be unique if the male reader is a villain at first. Supergirl tries to reform him. Through her kindness and understanding, he slowly changes. Their relationship goes from enmity to a complicated attraction. It's different from the usual hero - civilian love stories.
It can be a relationship of mutual respect. The Kryptonian respects Batman's intelligence and determination despite being a mere human. Batman respects the Kryptonian's power and their sense of justice. They might have different approaches to solving problems, but they recognize the value in each other's methods. For instance, when facing a powerful villain, Batman would come up with a strategic plan while the Kryptonian uses their powers to execute it.
One common storyline could be the little girl looking up to Supergirl as a role model. For example, the little girl might witness Supergirl saving the day and then be inspired to be brave in her own life, like standing up to bullies at school. Another could be Supergirl taking the little girl under her wing to protect her from some sort of danger that is targeting the girl because of her special abilities or knowledge. Maybe the little girl has a unique connection to an alien artifact and Supergirl has to keep her safe from those who would misuse it.
She could be depicted in different power levels in fanfiction. Maybe in some stories, she discovers new powers or has limitations on her existing ones. This can add interesting twists to the plot as she has to adapt to these changes.
In Saiyan fanfics, their relationship is complex. Vegeta is a proud Saiyan and Bulma is a smart Earthling. Their love story usually involves Vegeta learning about emotions and Bulma helping him adapt to Earth. It's an interesting dynamic that often makes for great fanfic material.
In many Young Justice fanfictions, Supergirl can be portrayed in various ways. Sometimes she's shown as a powerful and somewhat naive newcomer to the team. She might struggle to fit in with Earth's customs while still being eager to prove herself. For example, she could be depicted as being overly enthusiastic in battles, which might cause some initial friction with the more experienced members of the team.
A story could be about them both being judges in a city - wide talent competition. Catwoman is there because she has a soft spot for the arts and the underdog performers. Supergirl is there to promote positive values. They have different views on some of the contestants, which leads to some interesting exchanges.
Often, it's portrayed as a relationship full of tension. Harry is the hero of the wizarding world who fought against Voldemort, and Narcissa was on the side of the Death Eaters. But in fanfic, this can be flipped. Some portray Narcissa as secretly admiring Harry's courage, which could lead to a strange, unspoken respect between them.
One unique way is to make Bumblebee and a Decepticon character have a mentor - mentee relationship in a reversed way. Maybe a Decepticon who has been around for a long time and has seen a lot can teach Bumblebee some valuable lessons about survival in the war - torn world, not because he wants to help Bumblebee but for his own amusement. And Bumblebee, in turn, starts to understand the Decepticon better.