One common theme is identity. Since Castiel is usually male in the original series, when she's female in fanfiction, there's a lot of exploration about how she sees herself and how others perceive her. For example, some fics show her struggling with the new body and the expectations that come with it.
Another theme is the idea of identity. How does Castiel's female form change her perception of herself and how does Dean view her differently? It can lead to stories that are centered around self - discovery and acceptance. In some fanfictions, Castiel struggles with being in a female body and Dean helps her come to terms with it, which is a really interesting take on their relationship.
Yes, there are. A lot of these fanfictions play with the characters' personalities. For example, they might develop a romantic relationship that's different from what's shown in the original work. The female dean could bring a new perspective to the relationship with Castiel. You can often find them by searching specific tags related to the two characters on fanfiction websites.
There's also 'A New Dawn for Dean and Castiel'. In this fanfic, the female Castiel is depicted as a very strong and independent character. Her interactions with Dean are filled with both tension and affection. It's a story that plays with the idea of their destinies being intertwined in a unique way. It shows how they support each other through various challenges and how their relationship evolves over time.
One common theme is the exploration of a different kind of relationship dynamic. Since Castiel is female in these fictions, it often changes the power balance and the nature of their connection. Another theme is the adaptability of both characters. Dean has to adjust to a female Castiel, and she has to navigate her new form in relation to him.
One popular female Castiel fanfiction is 'The Angel's New Form' which explores her relationships within the Supernatural universe in a unique way. It delves into how her female form changes the dynamics with other characters like Dean and Sam.
Castiel's relationship with his powers might also change. He may have to limit his use of angelic powers to protect the unborn entity. This can cause internal conflict as he is used to using his powers freely. At the same time, it can also show his growth as a character, as he is willing to sacrifice some of his power for the sake of something new and precious.
If we're talking about Castiel from 'Supernatural', his story is complex. He is an angel who rebels against Heaven's orders. He becomes involved with the Winchester brothers, Sam and Dean, and helps them fight various supernatural threats. He has his own journey of self - discovery, dealing with his loyalty to Heaven, his newfound friendships with humans, and the struggle between good and evil in the context of the show's universe.
Harry Potter himself would be very interesting. Castiel could be intrigued by Harry's connection to Voldemort and his role as the 'Chosen One'. He might offer Harry some unique insights from his angelic knowledge about dealing with dark forces, which could be different from what Dumbledore has taught him.
In dean - castiel relationship in such fanfiction, there's often a deep emotional connection. They might show a side of extreme vulnerability towards each other. Their relationship can be intense, with a lot of passion and a sense of 'destined to be together' kind of feeling.