A common theme is the exploration of Castiel's humanity. When he's being protective of the hurt Dean, he starts to understand human emotions like love, fear, and worry on a deeper level. This can lead to his own character development as he becomes more in tune with his human side while still maintaining his angelic essence.
One common theme is loyalty. Gabriel's protectiveness shows his loyalty to Castiel. Another theme is sacrifice. Gabriel might be willing to sacrifice his own well - being or position to keep Castiel safe. For example, he could risk getting on the wrong side of other powerful angels.
One common theme is the bond between the brothers. When Dean is hurt, it tests and strengthens their relationship. Another theme could be sacrifice. Sam might be willing to sacrifice his own well - being or safety to protect the injured Dean. Also, there's often the theme of recovery, not just physical but also emotional as Dean recovers from his injury with Sam's support.
One common theme is the vulnerability of Castiel. When he's hurt, it shows a side of him that's not often seen - his fragility. It makes the readers feel more sympathetic towards him.
One common theme is the idea of unconditional support. Castiel is often depicted as being there for Dean no matter what, through his darkest moments. For instance, when Dean is haunted by his past actions or when he's feeling extremely guilty.
One possible fanfiction could be that Dean gets seriously injured during a hunt. Castiel, feeling a deep sense of protectiveness, uses his angelic powers to heal Dean as much as he can. He then stays by Dean's side, warding off any potential threats, whether they be other supernatural creatures or even humans with bad intentions. Castiel refuses to leave Dean's side until he's fully recovered, and in the process, their relationship deepens, with Dean realizing just how much Castiel cares for him.
One common theme is the deepening of their relationship. When Derek is protective of a hurt Stiles, it often shows a level of care that goes beyond friendship, leading to a romantic or very close bond. Another theme is Derek's struggle with his werewolf instincts. He has to control his aggression towards the source of Stiles' harm while also being gentle with Stiles. For example, if a rival pack hurt Stiles, Derek might want to go on a full - scale revenge mission but has to hold back to take care of Stiles first.
Love and friendship are also very common themes. Whether it's a platonic love or a more romantic love, it's often explored. In some fanfics, they have to hide their feelings from others, which adds an element of secrecy. And then there's the theme of sacrifice. They are both willing to sacrifice themselves for the greater good and for each other.
One common theme is loyalty. They are always there for each other in most fanfics, no matter what the situation is. Another theme is the struggle between the human and the supernatural world as Castiel is an angel and Dean is a human hunter.
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.
The theme of Castiel being tortured, either physically or mentally, is quite prevalent. It could be at the hands of demons or other angels. And then there's the aftermath of his hurt, like his struggle to regain his strength or his faith. Also, his relationship with Dean often takes center stage during his time of hurt, with themes of Dean's protectiveness and Castiel's dependence on him.