Maybe it's a tomboyish girl who doesn't care about losing her glasses in the pool. She's more interested in having fun and being active in the water.
The main character could be a girl who is on a journey of self - discovery. Jumping in the pool without her glasses is just one of the things she does to challenge herself and see the world in a different light.
Well, perhaps she jumps in the pool without her glasses because she's in a rush to join her friends. Once in the water, she realizes she can't see clearly but still has a great time playing water games. Later, she might worry about how she'll find her glasses when she gets out.
The main character would obviously be the girl without glasses. There could also be the person who dunks her, whether it's a friend, a rival, or just an accidental bystander. Another possible main character could be someone who witnesses the event and then becomes involved in the girl's story afterwards, like a lifeguard who has to deal with the situation.
The main character could be an aspiring actress. She's at an audition and has forgotten her glasses. In the crowd of other auditionees, she stands out because of her natural beauty and her nervous energy. A casting director notices her and decides to give her a chance, not just because of her looks but also because of the unique way she presents herself without her glasses.
The main character could be a young student. She usually wears glasses in school but one day forgets them at home and it happens to be a rainy day. She has to navigate through her school day without them, facing challenges like reading the blackboard and recognizing her friends from a distance. But she also discovers new things about herself and her environment on this glasses - free rainy day.
Perhaps the girl without glasses is near the pool, and someone accidentally bumps into her, causing her to be dunked. This event might be a turning point in the fanfiction. It could lead to her meeting someone new at the pool, like a boy who helps her out and they start a new friendship or something more romantic as the story unfolds.
It could be the roller coaster operator. He might notice the girl without glasses and be intrigued by her. He could play a significant role in her adventure on the roller coaster, like making sure she has a safe and exciting ride.
It could be a young student. She's always losing her glasses because she's so distracted by her studies. One day, she's groping for them in the library after accidentally knocking them off while reaching for a book. She's the typical book - loving, slightly clumsy character who has adventures in the academic world, like trying to find rare books or dealing with strict librarians.
She could be a young detective in a mystery - based fanfiction. Usually, she uses her glasses to carefully observe clues. But without them, she glares in annoyance when she misses something important. She might be on the case of a stolen artifact or solving a murder mystery, and her lack of glasses is a hindrance that makes her more irritable.
The girl without glasses is the central figure. There may be an antagonist like a school bully who constantly teases her about her wedgies and her glasses - free look. Then there could be a wise old janitor who gives her advice on how to deal with the bullies and how to embrace her new self. There might also be a group of girls who initially exclude her but later come to accept her as she shows her true character despite the physical changes.
One of the main characters would be the girl. There could also be a pilot who survived the crash. The pilot, despite being injured, tries to use his knowledge to make the situation better. And there might be a journalist among the survivors who starts documenting the whole experience, which includes the girl's story of surviving without her glasses.