Another plot could involve Annabeth having to deal with a quest or a difficult situation during her period. She has to use her wits and strength even though she's not feeling her best physically. This could show her resilience and how she overcomes the added challenge of her period while still being a badass demigod.
One possible plot could be Annabeth trying to hide it at first. She might be worried about how the other campers, especially the boys, would react. So she tries to carry on with her normal activities like training and strategizing but is constantly distracted by the discomfort.
Maybe in the fanfiction, Annabeth's friends, like Piper or Hazel, notice something is off. They figure out she got her period and are super supportive. They help her get the supplies she needs from the camp store or wherever and offer her advice on dealing with cramps and mood swings, all while making sure she doesn't feel embarrassed.
Well, it could be about Annabeth learning to deal with this new aspect of her life while still being in the middle of her adventures. Maybe she has to quickly figure out how to manage it in a world full of monsters and quests.
One possible plot could be that Annabeth and Percy Jackson are finally in a stable part of their lives. They are married and settled. Then Annabeth discovers she is pregnant. The story could follow their journey of preparing for the baby, with Percy being overly protective and Annabeth trying to balance her normal activities with the new changes in her body. They might face challenges like dealing with the reactions of their demigod friends, some being excited and others worried about how a baby would fit into their dangerous world.
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.
It could be about Lily's friends supporting her during this new experience. Maybe they bring her comfort items like warm tea and chocolate.
It could also be a new character introduced in the fanfiction. Maybe a powerful demigod from another camp who Annabeth meets during a diplomatic mission. This would create a whole new set of drama and conflict, as Annabeth would have to deal with her feelings for Percy and this new person, as well as the implications of having a child with someone other than Percy.
One possible plot could be that Annabeth has to balance her pregnancy with her heroic duties. Maybe she's still involved in some sort of quest but has to be more cautious. Her friends, like Percy, would be very protective and help her out.