Well, clearly Ben is one of the main characters. He is the wielder of the Omnitrix which gives him the ability to transform into various alien forms. He is known for his sense of justice and his eagerness to protect the Earth and the universe from various threats.
One popular type of Ben 10 and Fem Khyber fanfiction might involve them teaming up against a common enemy. Maybe in a story where an ancient alien threat emerges and they have to put aside their differences. For example, Fem Khyber could use her skills and knowledge of the alien underworld, while Ben uses his various alien forms from the Omnitrix to fight the new foe.
In some fanfictions, there might be female versions of some of the alien species that are popular in the Ben 10 universe. These female alien characters with their own Omnitrix - like devices could be popular. For example, a female Heatblast or a female Four Arms. Their unique abilities and personalities would attract readers, and the stories could explore how they use their powers in different situations compared to their male counterparts.
It could be a mad scientist who wants to control both Ben 10 and the fem xenomorph for his own evil purposes. He might try to extract their powers or use them as weapons.
Well, Ben is obviously one of the main characters as the story is centered around him and the Omnitrix. Gwen might also be a main character as she often plays an important role in Ben's adventures, providing support or using her own magical abilities to help out. Grandpa Max could be another main character, offering his wisdom and experience to guide Ben through various situations.
In some 'ben 10 and attea fanfiction', Grandpa Max can also be a significant character. His experience and wisdom as a Plumber can guide Ben in his interactions with Attea. And there could be other alien characters from Attea's species who either support or oppose her, which also adds to the complexity of the main characters' relationships.
Most likely Ben Tennyson would be the main character since it's about him unlocking the master control. His grandpa Max and cousin Gwen might also be important characters as they are often involved in Ben's adventures in the Ben 10 universe.
The main characters are obviously Ben and Kai. Ben is the wielder of the Omnitrix, which gives him the power to transform into various alien forms. Kai is a strong - willed and adventurous character who often gets involved in Ben's escapades.
Well, it's obvious that Ben and Gwen are the central characters. Ben is the one with the cool Omnitrix. He can turn into aliens like Heatblast or Four Arms. Gwen, his cousin, is no less important. Her magic powers range from creating force fields to shooting energy blasts. Together, they make a great team. Ben brings the alien - powered muscle, and Gwen brings the magic - infused intelligence. They face all kinds of challenges, whether it's an evil alien invasion or a mysterious magical anomaly, and they rely on each other to get through it all.
Gwen is often paired with Dark Ben in fanfiction. Their dynamic can be really interesting as she tries to bring out the good in him or stop his evil plans. Another character is Kevin. He might team up with Dark Ben for a while, either because they have a common enemy or Kevin thinks he can control Dark Ben's actions.
Well, from what we can gather, it seems the RWBY characters will be important. Maybe Ruby, Weiss, Blake, and Yang could be involved as they are the main characters in RWBY. And then there's this 'Ben' character. It's possible that the story focuses on their interactions, especially with the RWBY characters being in an attacking role towards Ben. However, it could also introduce other secondary characters from the RWBY universe or even create new ones for the fanfiction's plot.