Yes, there are some out there. You can start by looking on fanfiction websites like Archive of Our Own. Some fanfics might explore unique crossovers between the magical world of Harry Potter and the high - school drama setting of Quinn Fabray from 'Glee'. However, the quality can vary greatly.
One possible storyline could be Quinn is transported to the Harry Potter universe. She might use her charm and wits from 'Glee' to navigate Hogwarts and form friendships or rivalries with the characters there. Another could be that a spell goes wrong in the wizarding world and it somehow connects to Quinn's world in 'Glee', leading to a cross - over adventure.
One common theme is friendship. The relationships between Rachel and the Fabray twins can be explored in terms of how they become friends or deal with their differences. Another theme is competition, especially in the context of the Glee club.
It could be inspired by her dreams. People often get creative ideas from their dreams. Lucy might have had some vivid and interesting dreams that she wants to expand on and turn into a novel. She could be exploring new worlds, characters, and storylines that came to her during sleep.
You can try fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Rachel Glee Fabray Twins' on their search bars, and you'll likely find a variety of fanfictions related to it.
I'm not sure what type of Jereff and Lucy Doujinshi you're referring to. If you can provide more background information or context, I will try my best to answer your questions.
She might start to blush furiously. Given her character, she is a bit shy when it comes to romantic matters. And then she might start to stammer out a response, not really sure what to say at first. As she composes herself, she could tell Natsu that she has feelings for him too but in a very gentle and sincere way.
Erza could also be a main character. Given her strong and motherly side, she would probably take on the role of taking good care of baby Lucy. She might be strict about following a routine for baby Lucy's care. Happy, the flying cat, could be another important character. He could use his unique abilities to search for clues on how to turn Lucy back to normal.