In a 'kuroko turns into a girl fanfic', perhaps there's a magical event that causes the transformation. Kuroko, as a girl, could discover new aspects of his/her personality. For example, he/she might find that he/she is more in touch with emotions or has a different sense of style. And there could be a whole story about how he/she tries to fit into this new body while still maintaining his/her old relationships and goals.
His friends from his original life could be main characters. For example, if he has a best friend, that person would play an important role in helping Kuroko adjust to being a girl. Maybe they would offer support and advice, or just be there to listen when Kuroko has a tough time dealing with the changes.
Well, when Kuroko turns into a girl, it could lead to a whole new set of adventures. For starters, she would have to deal with the physical changes. Her voice might be different, and she would have to get used to the different body mechanics. In the story, this could be a source of humor as she tries to run or jump as she did before. Also, her relationship with the coach might change. The coach could be more protective or have different expectations of her. And the story could also explore how she copes with the reactions of fans, who might be very surprised to see this new version of Kuroko.
One idea could be that Kuroko turns into a girl due to a magical experiment gone wrong. His friends are initially shocked but then start to see the new 'her' as just Kuroko with a different appearance. Maybe there could be a plot where 'she' has to adapt to the different treatment from others in the basketball team, like some being overly protective or others being a bit awkward around 'her'.
The antagonists in the story, if there are any, could use Kuroko's secret against her. They might spread rumors or try to get her kicked out of the group she's in. On the other hand, some of the neutral characters could be swayed either way depending on how Kuroko presents herself and how the situation is handled.
Maybe the plot could involve Kuroko having a secret crush on a boy in her group, but she can't show her true feelings because she's been hiding her gender. As the story unfolds, she has to deal with the internal struggle of wanting to be honest about who she is while also not wanting to disrupt the dynamic of the group she's in.
First, you need to establish the reason for the transformation. It could be a magical spell gone wrong, or some kind of strange dragon - related phenomenon. Then, focus on how Hiccup adjusts to her new body. She'll have to deal with different physical abilities and limitations. For example, she might be physically not as strong as before, but more agile in some ways.
A fanfic could explore how Hiccup's transformation into a girl affects his friendships. Astrid might react in a complex way. At first, she could be jealous or confused, but then they could form a stronger bond. Also, Hiccup's father, Stoick, might have a hard time adjusting to his son becoming a daughter, which could add a lot of emotional depth to the story.
One possible scenario in this fanfic could be that Tony Stark, through some sort of magic or scientific experiment gone wrong, turns into a girl. This could lead to a whole new set of adventures and character developments. For example, his relationships with other characters like Steve Rogers (Stony) would be completely different. He might have to face new challenges in a different physical form, such as how society and his friends would accept him. Also, his own self - perception would change, and he'd have to re - evaluate his identity.
Well, the plot could involve his teammates having to take care of him. They might struggle at first because Kuroko as a baby can't communicate in the same way. Maybe they have to figure out his needs like when he's hungry or sleepy. And they could also try to keep it a secret from the other teams to avoid any distractions during games.