Her best friend could be a main character. This friend might be the first one Lily tells about getting her period and could offer practical advice like which pads are the most comfortable.
One possible aspect to consider in 'Starfire Gets Her Period' fanfiction could be how it explores the character's growth. It might show her dealing with a new and somewhat embarrassing experience in a human - like way, which could deepen her connection to Earth and its customs.
The fanfiction might also explore the reactions of the other characters in Full House. Her family members, like Danny, Jesse, and Joey, could have different ways of handling the situation. Danny might be overly protective and want to make sure she has everything she needs. Jesse could be a bit more laid - back but still offer his support. Joey might try to use humor to make Stephanie feel more at ease.
One possible plot could be Bulla's initial confusion and fear when she first gets her period. She might try to hide it from her family at first, not fully understanding what's happening. Then perhaps Bulma discovers it and has a mother - daughter talk with her, explaining the biological process and reassuring her.
Perhaps it focuses on Eleven's own journey of self - discovery during this time. She might feel different and start to explore more about her femininity. It could also show how she copes with the hormonal changes and the emotions that come with getting her period.
It could be about how Temari deals with the physical and emotional changes. Maybe she tries to hide it at first, fearing it might affect her ninja duties.
In a 'Mulan Gets Her Period' fanfiction, perhaps the story could focus on how the other female soldiers in the camp, if there are any, support Mulan. They could form a sisterly bond over this shared experience, and together they might find ways to make things easier for all of them during that time of the month, like creating a more private and comfortable space.
It could be about Tenten dealing with the new experience of getting her period while also trying to maintain her ninja training. Maybe she has to hide it from her male teammates at first out of embarrassment.
One possible theme could be self - discovery. A character realizing that getting her period is a sign of growing up and starting to understand her own body better.