Well, the action scenes are often a highlight. When Lelouch uses his wits and abilities to outsmart the bad guys and reach the girl in time, it's really exciting. For example, in some fanfics, he might use his Geass power in a creative way to save her.
Physically, of course, there would be obvious changes. But personality - wise, he might become more in touch with his emotions. In the original, Lelouch was often very calculating and hid his true feelings. As a girl, society in the story might expect her to be more open about her emotions, which could force her to confront and express them more.
One great 'Lelouch saves girl' fanfiction is 'The Rescued Princess'. In it, Lelouch stumbles upon a girl being held captive by a rebel group. His quick thinking and strategic skills come into play as he devises a plan to free her. It's a thrilling read with a lot of action and some really sweet moments between Lelouch and the girl.
I'm not entirely sure. Fanfic communities are vast and diverse. While it's possible that someone has written a fanfic with this concept, it could also be quite rare. It really depends on the creativity and interests of the fanfic writers within the Lelouch - related fandom.
One possible plot could be Lelouch, as a girl, using her new identity to infiltrate an all - female organization that was previously off - limits to him as a male. She could use her charm and wits in ways that are different from when she was male, creating unique storylines.
A sense of wonder and magic is also a common theme. The very existence of mermen in these stories is a magical element. When the merman saves the girl, it's not just a physical rescue but also an introduction to a world full of wonder. The merman might have special powers like controlling the sea or communicating with sea creatures, and this all adds to the sense of magic in the fanfiction.
There's a fanfiction titled 'Saving the Girl from the Darkness'. In it, Naruto discovers a girl who has been trapped in a genjutsu for years. His own experience with loneliness and his strong will allow him to break through the genjutsu and save her. The story delves deep into Naruto's character, showing how his past traumas have made him more empathetic and determined to help those in need.
A fanfiction could focus on an alternate universe where the Black Knights discover a secret about Lelouch's face. Maybe there's a hidden mark on his face that is related to some ancient power or prophecy. This discovery could change the way the Black Knights view Lelouch. They might start to question his motives more or they could become even more loyal to him, believing that he is the key to achieving their goals. His face then becomes not just a physical feature but a central element in the power dynamics within the group.
Perhaps the little girl is being targeted by a group of bandits. Naruto senses her distress and jumps into action. He battles the bandits using his shadow clone jutsu, overwhelming them. After saving her, he realizes she has no place to go. So, Naruto decides to take her back to Konoha. In Konoha, he helps her adjust to the new environment, and she in turn becomes a big fan of Naruto, following him around and learning about the ninja way from him.