One common theme is the healing process. Bucky has a lot of trauma to deal with, and Darcy can be a source of comfort and support for him. For example, she might help him come to terms with his past as the Winter Soldier.
Sure! You can check out Archive of Our Own (AO3). There are numerous Bucky Barnes x Darcy Lewis fanfictions there. Some popular ones often involve them getting to know each other in different post - battle scenarios. For example, in some fics, Bucky is adjusting to modern life and Darcy helps him with that while they develop feelings for each other.
Another theme is self - discovery. Darcy in some fanfictions is on a journey to find out more about herself, her capabilities, and her place in the world she's in. For example, she might realize she has leadership skills she never knew about before.
One common theme is redemption. Bucky has a troubled past as the Winter Soldier, and in many fanfictions, Darcy helps him find his way back to a more positive self. For example, in some stories, she provides emotional support that aids his healing process.
One common theme is cultural exchange. Since T'Challa is from Wakanda with its rich culture and Darcy is from a different background, their relationship can be a vehicle for exploring how different cultures interact. Another theme could be adventure. They might go on quests together, using T'Challa's combat skills and Darcy's smarts.
One common theme is the exploration of their powers. Writers like to show how their powers can complement each other. Another theme is the healing process. Given their traumatic pasts, fanfictions often focus on how they help each other overcome their inner demons.
One common theme is redemption. Bucky has a complex past, and in many fanfictions, his relationship with Lectora helps him find a new path. Another theme is love against all odds. Their different backgrounds or circumstances often create obstacles for their relationship, but they overcome them.
One common theme is the exploration of their relationship against the backdrop of the complex Marvel universe. Since both characters have their own traumas and stories, fanfiction often delves into how they support each other through those.
A common theme is friendship. They've been through a lot in the Marvel universe, and fanfictions often explore how they become true friends. For example, stories might show Bucky opening up to Sam about his past as the Winter Soldier, and Sam being there for him.
Another theme is the support she gets from others. Her friends or colleagues often come to her aid, highlighting the importance of relationships in difficult times. In many of these fanfictions, the bond between Darcy and the other characters deepens because of her injury.
Another theme is self - discovery. When she goes through hurt, she often discovers new aspects of herself. She might realize she's stronger than she thought or that she has different priorities in life. This is seen in many fanfictions where she has to deal with emotional turmoil.