Well, 'Mrs Frisby and the Rats of NIMH' is a science - fiction work mainly because of the scientific and technological elements it contains. The rats in the story possess intelligence and skills far beyond what is normal for their species. This was brought about by experiments at NIMH. It also explores themes like the relationship between science and nature, and how these super - intelligent rats adapt to a world that is not made for them. The very idea of creating such intelligent animals through scientific means is very much in the realm of science fiction.
I'm not sure specifically who Bridget Barton is within the context of Fantastic Fiction. It could be an author, a character, or someone related to the Fantastic Fiction community. More information would be needed to give a more definite answer.
Mrs Frisby is a main character. She is a mouse who gets involved with the rats of NIMH. The rats themselves are also main characters. They are the ones who have been through the scientific experiments at NIMH and have their enhanced intelligence.
One idea could be exploring the backstories of the rats in more detail. For example, how they coped during their time at Nimh before escaping. Another could be a story where Mrs Frisby has to go on a solo adventure to save her family without the direct help of the rats. Maybe she discovers a new group of animals with special abilities that she has to convince to help her.
Definitely Mrs Frisby herself. She's a brave and resourceful mother mouse. Her determination to protect her family makes her a great character to explore further. You could write about her internal struggles and how she overcomes her fears. Another interesting character is Nicodemus, the wise old rat. His leadership and knowledge are fascinating, and you could write about his past and how he came to be such a respected figure among the rats.
I'm sorry, I don't have specific information about Bridget Moretti's real story. There could be many people with this name. Maybe she is a local figure in a particular community or has a story within a specific context that needs more background to be told.
Adventure is also a popular theme. Many fanfictions take Bridget and Franky on exciting adventures, whether it's exploring a new land or solving a mystery. It makes for a very engaging read. For example, in some fanfictions, they might be on a quest to find a lost treasure. This allows for a lot of action and discovery along the way.
One key element could be her family. Whether she had a loving family or was on her own, it would influence her character development. Another might be the place she grew up in. A rural area or a big city could offer different opportunities and challenges.