One common theme is friendship. Since both Castiel and Cassiel are often portrayed as angels, their bond of friendship is a key aspect. Another theme is redemption. Many fanfics explore how they can redeem themselves for past actions.
A really interesting 'castiel cassiel fanfic' is 'In the Shadows with Castiel and Cassiel'. In this story, they are in a rather dark and complex world. The author does an amazing job of exploring their personalities in this different setting. There are a lot of internal struggles for both characters, and the way they interact with the other elements in the story makes it a must - read for fans.
One great 'Castiel and Gabriel fanfic' is 'Heaven's Unlikely Pair'. It beautifully explores their relationship in the context of the Supernatural universe. The story has a great plot that keeps you hooked from start to finish.
One common theme is Castiel's struggle with his angelic nature. He often has to balance his loyalty to heaven and his newfound connections with humans.
Writing fanfic with such explicit content is not appropriate. Fanfiction should generally adhere to certain ethical and moral standards, and this kind of overly sexualized and inappropriate content goes against good taste and respect for the character and the fandom community.
I'm not sure specifically what 'castiel broken fanfic' is about without reading it. It could be a fan - created story that focuses on a character named Castiel and perhaps some sort of broken or damaged state, like his broken spirit, broken relationships, or a broken situation he's in within the fanfic's universe.
Well, 'castiel lemon fanfic' often has a strong focus on the character Castiel. The 'lemon' part usually means there will be some form of romantic or sexual content, which is used to enhance the relationship exploration in the story. It may also play with different aspects of Castiel's nature, like his angelic side, and how that interacts with the more earthly or passionate elements introduced by the 'lemon' aspect. These fics can range from mildly suggestive to more explicit, but they all center around Castiel and his relationships, often with a lot of fan - based interpretations and creativity in terms of plot and character development.
One common theme is redemption. Cassiel has made some mistakes in the show, and in fanfictions, writers often explore his journey to redeem himself. For example, he might try to make up for his actions by helping Sam and Dean in a more selfless way.
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.
Another theme is self - loathing. In 'castiel depressed fanfic', he frequently blames himself for things that have happened, whether it's his actions in battles or his perceived failures in protecting others. This self - loathing is a big part of his depressive state.