Often, there's a theme of transformation. Harry's transformation into a 'baby fem' form brings about changes not only in her appearance but also in her relationships. There might also be a theme of loyalty. As Tom's mate, Harry may have to show loyalty in various situations, whether it's towards Tom or their shared goals. And of course, the theme of adventure can't be ignored. They could go on all sorts of adventures together, facing challenges that test their relationship and their individual strengths.
One common theme is the power dynamic. Since both Harry and Tom are powerful in different ways in the Harry Potter universe, fanfictions often explore how their powers interact when they are mates. For example, Harry's ability to resist the Dark Arts might contrast with Tom's inclination towards it.
I'm sorry, I don't have a specific 'baby fem harry is tom's mate' fanfiction to recommend directly. You can try searching on popular fanfiction websites like Archive of Our Own or Fanfiction.net.
In the 'baby harry is tom's mate' fanfiction, the plot might revolve around the idea that Tom discovers baby Harry and feels an instant kinship. It could lead to a series of events where Tom protects Harry or they are both part of some grander, magical plan that involves their relationship as mates. For example, they might be fated to change the wizarding world together in a way that no one else could.
A common theme is the exploration of power. Since Fem Harry is connected to Salazar, there's often a focus on her inheriting or accessing some of his ancient and powerful magic. Another theme is identity. She has to reconcile her modern self with this new, ancient connection to Salazar.
A lot of these fanfictions have the theme of redemption. Draco, who was initially a bit of a bully, often goes through a process of redemption as he realizes his feelings for Fem Harry. Also, the theme of secrecy is common. Because of their unusual relationship, they often have to keep it a secret from others in the wizarding world.
Another theme is power dynamics. Lucifer is a very powerful being, and fem Harry usually has her own set of powers or qualities. So, how they balance the power in their relationship is often explored. For example, in some fics, Harry might be initially intimidated by Lucifer's power but then learns to hold her own.
A common theme is the clash and then the melding of two different universes. Since Harry comes from the wizarding world of Harry Potter and Loki is from the Marvel universe, there's often exploration of how their different powers and cultures interact. Another theme is the development of their relationship, which usually starts with some sort of misunderstanding or conflict due to their very different personalities and backgrounds.
One common theme is the discovery of their relationship. Since it's a unique pairing, often the fic will focus on how they come to realize they are mates. Another theme is the clash of their different worlds. Harry comes from the wizarding world and Kisuke from his own world, so there's often a lot of exploration of how their two worlds' cultures and powers interact.
One common theme is the discovery of their bond. It usually starts with some sort of strange feeling or event that makes them realize they are meant to be together. Another theme is the challenges they face because of their relationship. In the wizarding world, there might be people who oppose their union or there could be magical obstacles.
A recurring theme is the exploration of their emotional connection. Since they are mates, there's a deep emotional bond that fanfiction authors like to explore. This could include how they communicate without words, their shared dreams or premonitions, and how they support each other through difficult times. Some fanfictions also focus on how their relationship changes them as individuals, making them more open - minded and stronger in the face of their respective worlds' challenges.