Friendship is also a big theme. Cassiel's relationships with the other characters, especially Sam and Dean, are often delved into. Writers might write about how they grow closer, overcome differences, and become true friends. This could involve things like Cassiel learning more about human emotions through his interactions with them.
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.
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.
Another option is Tumblr. Some bloggers share their own Supernatural Cassiel fanfictions or reblog good ones. You can search for relevant tags like #Cassiel #SupernaturalFanfiction. It's also a great place to interact with other fans who might recommend some hidden gems.
One common theme is power struggle. Abaddon is a powerful demon, so many fanfictions explore her battles for power, either against other demons or the Winchesters. Another theme is her backstory. Writers often delve into her past to give more depth to her character.
One common theme is forbidden love. Maybe a vampire falling in love with a werewolf in the academy, which goes against the norms of their species. Another is the underdog rising to power. A student who is initially underestimated but then discovers some great power within themselves.
One common theme is redemption. Since Adam had a rather rough deal in the show, a lot of fanfictions explore his journey towards redemption. Another is family. How he fits into the Winchester family dynamic, whether it's forming a bond with Sam and Dean or finding his place in the larger family of hunters.
One common theme is the aftermath of the events in the episode. Writers often explore how the characters deal with the consequences. Another theme could be the relationships between the characters, like Dean and Sam's bond, which might be further developed or tested in the fanfictions.
One common theme is redemption. Ketch has done some not - so - great things in the show, and in fanfiction, he often gets a chance to redeem himself. For example, he might help the Winchesters in a big way to make up for his past actions.
Character pairings are also a big theme. Some fanfictions might pair characters like Elsa with Dean, exploring how their different personalities and powers interact. There could be a story where Elsa's ice powers are seen as a form of magic that the 'Supernatural' characters have to either understand or combat. It often involves a lot of relationship building and character development within this unique crossover setting.
Many fanfics focus on the supernatural elements that were present in the episode. They might expand on the lore introduced in 14x14, or they could bring in other supernatural creatures or concepts from the broader Supernatural universe. Writers often use these elements to create more complex and engaging stories, delving deeper into the world that the show has created.