Well, identity is a common theme too. In 'female Muzan fanfic', the exploration of what it means to be Muzan as a female in a world that is mostly dominated by male demons. There's also the theme of survival. How does a female Muzan survive in a world full of threats? Some fanfics might show her using her wits and power to outsmart her enemies and stay on top.
One common theme is the exploration of femininity in a typically male - dominated character. Since Muzan is male in the original, making her female in fanfiction allows for a different take on power and how a female demon might rule.
One great 'female Muzan fanfic' could be 'The Female Muzan's Ascent'. It explores a unique take on the character, showing her in different scenarios and with different relationships. Another one might be 'Female Muzan: A New Perspective' which delves into her backstory in an interesting way.
Transformation is another popular theme. It could be the reader - insert changing muzan, or the other way around. Maybe the reader - insert is transformed into a being like muzan, or muzan starts to change his ways due to the influence of the reader - insert. These themes add depth and intrigue to the muzan x reader fanfiction.
Yes, there are quite a few. Some focus on an alternate universe where they have to team up for some strange reason. For example, in one fanfic, they have to face a new common enemy that is even more powerful than Muzan. Tanjiro has to put aside his hatred for a while to deal with this new threat.
One common theme could be empowerment. Since Haxorus is a strong Pokémon, in fanfics with a female Haxorus, she might be shown as a powerful and independent character. Another theme could be friendship, like her forming bonds with other Pokémon or trainers.
Another theme is the re - interpretation of relationships. For instance, the relationship with her family members or allies. If Dante is female, how would her connection with Vergil be different? Would it be more sisterly or still have elements of rivalry? Also, there could be new romantic interests that are unique to a female Dante's story.
The theme of self - discovery is also prevalent. As a female Castiel, she has to figure out her place in the world, both as an angel and as a female entity. This often involves her coming to terms with her new identity, learning about her powers in a different context, and finding her role in the fight against evil in a more female - centric way.
One common theme is empowerment. Female Ren is often shown as a powerful figure, breaking through barriers in a male - dominated world or within a complex social structure. For example, she might be the only female in a group of warriors and prove herself just as capable.
The theme of magic and the supernatural is quite common. Since the original story might have elements of the strange and magical, female dipper fanfics often expand on that. She might encounter new magical creatures or learn new spells. Also, themes of love and romance can be found in some fanfics, where she develops feelings for other characters in the story's universe.
One common theme is friendship. Many fanfics explore how a female character can form a unique friendship with Bakugo. His tough exterior can be a challenge, but that's what makes the friendship development interesting.