Family dynamics is another. As brothers, their relationship can be complex. Some fanfics show loyalty between them, while others highlight jealousy or rivalry. For example, a fanfic might explore how Frieza's jealousy of Cooler's strength affects their relationship.
The allure lies in the fact that we can see these two powerful villains in new situations. In fanfiction, they might interact with characters from other universes, which is really cool. It expands the Dragon Ball Z universe in ways the original didn't.
Power is a common theme. Since both Frieza and Cooler are powerful characters, many fan fictions explore how they gain more power, or how they compare their power levels. Another theme is family. Their relationship as brothers often plays a big part, like in stories about their rivalry or their attempts to cooperate. Redemption can also be a theme, especially for Cooler in some fictions where he tries to make up for his past actions.
Fanfiction also allows for different endings to their stories. Instead of their fates in the original series, they could be redeemed in some fanfictions. Picture Frieza actually learning to care about others and using his power for good. It's a different take on their characters that fanfiction can offer.
Another good one is 'Frieza and Cooler: Allies in a New World'. This fanfic imagines a scenario where they have to team up against a greater threat than they've ever faced before. It's full of action and shows how their powers combine in different ways.
One popular 'Frieza and Cooler' fan fiction is 'The Brothers' Rivalry Extended'. It delves deeper into their relationship, showing how their competitiveness affects their actions within the Frieza Force. Another is 'Cooler's Redemption', where Cooler tries to atone for his past misdeeds and Frieza has to deal with this new side of his brother. There's also 'Frieza and Cooler: A New Alliance' which imagines them teaming up against a common, powerful enemy that threatens their rule in the universe.
Frieza might initially be shocked. He's used to being a feared and powerful being, and the idea of having a family is very foreign to him. So he could be in denial at first.
One reason Naruto is cooler is his dream. He wants to be Hokage, and he chases this dream with all his might. He's not born with all the natural talent like Sasuke, but he overcomes his limitations through sheer hard work. His sense of humor is another plus. He can make people laugh even in the middle of a battle, which makes him a more relatable and cooler character.
To develop Cooler further, he could be given a redemption arc. Maybe he starts off as a villain but gradually realizes the error of his ways. He could befriend some of the younger Z - fighters who look up to him despite his past. This would force him to be a better role model and in the process, he would change and become a more complex and interesting character.