Zamasu meets his end in the manga because he underestimates the strength and strategy of Goku and Vegeta. They exploit his weaknesses and deliver the final blow that finishes him off.
One common theme is the clash of ideologies. Naruto has his values of friendship and protecting the village, while Zamasu has his own extreme views. So, this often leads to interesting conflicts in the fanfics.
Redemption could also be a theme. Although Zamasu in the original was quite villainous, a female Zamasu in fanfic might be on a journey of self - discovery and redemption. She could start as a bad character but gradually change due to certain events or interactions in the story.
She might be depicted as having a complex personality. On one hand, she could have a cold and calculating side due to her divine or self - proclaimed superior nature. On the other hand, there could be a hidden vulnerability that only the male reader gets to discover. This duality can make for an interesting exploration in the fanfic.
Well, in fanfics involving Female Zamasu and a male reader, it often explores a unique dynamic. The relationship could be based on the contrast between Zamasu's divine or complex nature and the more ordinary male reader. It might involve themes of power, redemption, or a journey of self - discovery for both characters.
In the manga, Goku managed to kill Zamasu by combining his strength with Vegeta and performing a joint attack. They also exploited Zamasu's weaknesses to gain the upper hand.
One common theme is the clash of ideologies. Naruto, with his belief in friendship and hard work, often clashes with Fem Zamasu's more extreme views. Another theme is the exploration of power. How their combined or individual powers affect the fictional world they are in. For example, if they fight together, how do they take on stronger enemies? Or if they oppose each other, who is more powerful in different situations.
I'm not sure which specific 'female zamasu fanfic' are popular. But you can try searching on fanfic websites like Archive of Our Own. They usually have a wide variety of fanfictions related to different characters.
A common theme is power - seeking. They are often depicted as constantly striving for more power and ruling over the universe. Another theme is their unique bond, whether it's a friendship or a more sinister partnership.