The theme of discovery is also prevalent. The OC often discovers the existence and significance of Castiel's wings, which can be a journey of self - discovery for both characters. It might also lead to the discovery of new aspects of the Supernatural world they inhabit, like hidden places or powers that are related to the wings.
Another one could be 'The Winged Guardian'. In this story, the sensitive wings of Castiel play a crucial role in protecting the OC. It shows how the wings are not just a physical feature but also a symbol of protection and a connection between Castiel and the OC. It has a lot of heart - warming moments and some exciting action scenes as well.
One common theme is protection. Castiel's wings often symbolize protection, and in these fanfictions, they might protect the reader from various threats in the Supernatural world.
One common theme is vulnerability. Castiel's broken wing makes him physically and often emotionally vulnerable, which is explored in many of these fanfics.
One common theme is redemption. The OC often has a past they need to make up for, and Castiel helps them in that journey. For example, in many fics, the OC might have accidentally caused harm in the past and is now seeking a way to right their wrongs with Castiel's guidance.
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.
One common theme is Castiel's struggle with his angelic nature and his growing humanity. He often has to choose between following angelic orders and doing what he believes is right. Another theme is his loyalty to the Winchesters, especially Dean. His relationship with Dean is a central focus in many fanfics, whether it's a deep friendship or something more. Also, themes of redemption are common, as Castiel has made many mistakes in the series and fanfics often explore his path to redemption.
One common theme is redemption. When Castiel is hurt, often the story will revolve around him finding a way to redeem himself, whether it's from a mistake he made that led to his pain or just from a sense of lost purpose. For example, in some fanfictions, he might have been hurt because he trusted the wrong entity and then has to make amends.
One common theme is friendship. Their bond, whether it's a platonic friendship or something more, is often explored. Writers like to show how they support each other through tough times.
One common theme is the theme of rescue. Usually, the other characters, like Dean and Sam, will go to great lengths to save Castiel. For example, they might face numerous dangerous creatures or powerful enemies in their quest to rescue him.
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.