First, you need to understand the character of Castiel well. Think about his relationships with Dean, Sam, and other characters. For example, his loyalty to Dean was a big part of his character. When writing his death, make it meaningful. Maybe it could be a sacrifice for the greater good, like protecting Dean from a powerful enemy. Then, focus on how the other characters react. Dean might be filled with guilt and anger, while Sam could be more focused on finding a way to bring him back.
One great Castiel - dead fanfiction is 'The Aftermath of an Angel's Fall'. It really delves into how the other characters in Supernatural deal with Castiel's death. It shows Dean's inner turmoil and Sam's struggle to come to terms with it.
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.
First, you need to know the characters well. Read up on Castiel's personality traits in the Supernatural series, like his loyalty, his confusion about human emotions at times. For the reader character, you can create a backstory that makes them interesting and relatable. Then, think of a plot. It could be something like the reader gets caught in a battle between angels and demons and Castiel has to save them.
One great aspect of Castiel and Dean in fanfiction is their dynamic. Their relationship, which is complex in the show, can be explored even further in fanfictions. Writers often delve into their unspoken bond, creating scenarios where they support each other in ways not shown in the original series. For example, some fanfictions might have them going on a road trip together just for the sake of exploring new places and having deep conversations about their pasts and futures.
Fanfiction about Castiel in Supernatural can be really interesting. Some 'hopeless' fanfictions might focus on his often tragic or difficult situations in the show. They could explore his loyalty to Dean and Sam even when things seem truly hopeless for him. Maybe it's about his struggle with his angelic nature and the chaos of the human world he's thrown into.
When writing fanfiction for these two shows, start by creating an outline. Decide on the main characters you want to focus on, the setting, and the overall arc of the story. Think about how you can combine the elements of Supernatural and The Walking Dead in an exciting way. For example, what if the Winchesters ended up in the world of The Walking Dead? How would they handle the zombies? What about if Rick Grimes and his group encountered a demon? Use your imagination and build a story around these ideas. Then, start writing, and don't be afraid to rewrite and edit as you go along to make your fanfiction the best it can be.
There's also a story where Castiel kidnaps a fan in a desperate attempt to save the world. It's a complex plot that involves time travel and alternate universes. You can find it on FanFiction.net. The story really delves into Castiel's character and his motives behind the kidnapping.
I remember reading a fanfic called 'Castiel's Wounds'. In this story, Castiel is severely injured during a battle with demons. The fic focuses on how Sam and Dean try to help him recover, and the relationship dynamics between the three are really well - written. It shows Castiel's vulnerability in a very believable way. There's also 'A World of Hurt' which explores Castiel's hurt in a post - apocalyptic setting, adding an extra layer of tension and drama.
Well, 'The Road Less Traveled' is a popular 'Supernatural Dean and Castiel fanfiction'. It's set in a post - apocalyptic world where they have to rely on each other more than ever. It has great character development and some really intense scenes. There's also 'Soulmates in the Shadows' which plays with the idea of them being soulmates in a unique way.
One common theme is redemption. Since Castiel has made some mistakes in the show, a lot of fanfiction focuses on him trying to make up for those. Another theme is his relationship with the other main characters, like Dean and Sam. His loyalty and how it is tested is often explored.