One common theme is the clash of two different worlds. Harry comes from the wizarding world and Agent Carter from the world of espionage. So, there's often a lot of exploration of how they deal with each other's different ways of doing things.
One great fem Harry and Agent Carter fanfiction is 'The Unlikely Alliance'. It's a story that beautifully weaves their two worlds together. Harry, as a female, brings her unique magic skills into the world of Agent Carter's post - World War II espionage. Their interactions are both intense and heartwarming as they team up to face a common enemy that threatens both the wizarding and non - wizarding worlds.
Another theme is sacrifice. They often have to make sacrifices for the greater good or for each other. For example, one might give up a personal opportunity to help the other in a dangerous situation. And also, the theme of discovery. They are constantly discovering new things about each other and about the world around them in these stories.
The theme of sacrifice is also quite common. Steve sacrificed his life (or so he thought) by crashing the plane. Peggy sacrificed her personal life to a great extent for the SSR and the fight against Hydra. Fanfics will often put them in new situations where they have to make more sacrifices. And then there's the theme of time. The fact that Steve was frozen for decades while Peggy aged is a rich area for exploration in fanfics. They deal with how time has changed them and yet how some things between them remain the same.
One common theme is the clash and combination of different knowledge systems. Harry comes from a world of magic, with spells and potions, while Samantha is used to science and technology. Fanfictions often explore how they can learn from each other, like Samantha trying to figure out how magic works scientifically, or Harry being introduced to advanced technology.
The theme of self - discovery is also prevalent. As they take on the role of agents, the characters, like Harry, often learn more about themselves, their powers, and their place in the wizarding world. They have to make tough decisions that shape their identities. Additionally, loyalty is a big theme. Agents have to decide who they can trust among their colleagues and in the wizarding community at large. In some fanfictions, Harry has to question the loyalty of those around him while remaining true to his own values.
I would recommend 'When Agent Carter Met Thor'. It's a unique take on the crossover concept. It explores how Peggy would interact with Thor, a very different kind of character from her own world. It has some great dialogue and action scenes that make it an enjoyable read.
One common theme is loyalty. Since the characters are double agents, they constantly struggle with where their true loyalties lie, whether it's to the good side like the Order of the Phoenix or the dark side like the Death Eaters. Another theme is secrecy. They have to keep their double identity a secret which adds a lot of tension to the story.
Another theme is self - discovery. Through their relationship, both Harry and Fem Draco learn more about themselves. Harry might discover a different side of himself that he didn't know existed when he's with Fem Draco, and Fem Draco might find her true identity apart from what her family and house expected of her.
One common theme is self - discovery. Since it's a female Harry, she often has to discover her own identity in a world that has different expectations. Another theme is the bond with the creatures. These stories usually focus on how the special connection with the magical creatures helps Harry in her journey.
One common theme is the struggle between fem Harry's identity as a detective and her wizarding heritage. For example, in some fics, she has to hide her magical abilities while solving non - magical crimes. Another theme is the search for truth. As a detective, she is constantly on the quest to find out what really happened in a particular case, whether it involves dark magic or just regular criminal activities.