Obviously, the Powerpuff Girl Z themselves - Blossom, Bubbles, and Buttercup. They are the main characters and any story about them will likely be popular. But also, Mojo Jojo can be a great addition. His evil plans and the way he clashes with the girls always make for an interesting plot.
Another character that could be popular in fanfiction is Him. He is a very powerful and mysterious villain. His presence can add a lot of danger and intrigue to the story. You can write about how the girls struggle to defeat him and what kind of powers or strategies they need to come up with to face such a formidable foe.
The Professor is also a popular character to include. He is like a father figure to the girls and his scientific knowledge can play an important role in the fanfiction. For example, he could create a new device that either helps the girls or accidentally causes trouble. Townspeople like Ms. Keane can also be included to show the impact of the girls' actions on the community.
Some of the supporting characters like the Mayor or Ms. Bellum can also gain popularity in fanfiction. They might be given more backstory or a more important role in a particular story. For example, a fanfiction could focus on the Mayor's secret past as a superhero in training or Ms. Bellum's role in a top - secret government project that somehow ties in with the Powerpuff Girl Z's adventures.
Blossom Z is often very popular. Her leadership skills and strong powers make her a central figure in many stories. Writers like to explore how she makes decisions in difficult situations.
Obviously, Blossom, Bubbles, and Buttercup are the most popular. They are the main characters after all. But villains like Mojo Jojo are also often included as they provide great conflict. Also, the Professor who created the Powerpuff Girls can be an important character in fanfiction, especially if it involves the origin story or some kind of scientific experiment gone wrong.
Professor Utonium is a popular character to include. He is the creator of the Powerpuff Girls and his relationship with them can be explored in different ways in fanfiction. Maybe he creates a new experiment that has unexpected consequences for the girls. Another popular character could be the Rowdyruff Boys as they can create interesting rivalries and storylines with the Powerpuff Girls.
The Powerpuff Girls Z themselves - Blossom, Bubbles, and Buttercup are often very popular. Fans love to write about their different personalities and how they interact with each other. For example, Blossom's leadership, Bubbles' kindness, and Buttercup's tough - girl attitude. Also, the villains like Mojo Jojo can be popular. His devious plans and his rivalry with the girls make for interesting stories in fanfic.
One popular pairing could be Blossom from Powerpuff Girls Z and Ruby from RWBY. Their leadership qualities might draw them together, and they could be seen as a powerful duo in combat situations, with Blossom's intelligence and Ruby's speed and scythe - wielding skills complementing each other.
The Powerpuff Girls Z Blossom, Bubbles, and Buttercup are often popular. Their unique personalities and powers make for great storylines. Blossom's intelligence, Bubbles' sweetness, and Buttercup's toughness can be explored in different ways.
The main characters are usually the Powerpuff Girl Z themselves, Blossom, Bubbles, and Buttercup. They are the ones that most of the stories revolve around as they have their superpowers and get into all sorts of adventures.
Well, it's hard to say exactly who the most popular ones are as it can vary from person to person. But some OCs that are often liked are those with really cool and unique powers. For instance, an OC with the ability to control elements like fire, water, earth and air all at once is likely to be popular. They can bring a whole new level of action to the fanfic.
The Professor is another character that often appears in fanfiction. Writers might explore his backstory more, or they could create scenarios where the Professor has to make difficult decisions regarding the girls' powers or safety. His role as the girls' creator gives a lot of room for interesting plot developments.