It's possible that the main characters are a group of Red Rangers who are brought together by some mysterious force. They initially clash because they are used to being the leaders in their own respective teams. However, as the story progresses, they learn to cooperate and combine their powers to face a common enemy that is much more powerful than any of them alone.
Well, it could be about two Red Rangers from different teams or timelines who clash due to a misunderstanding. Maybe one Red Ranger thinks the other is a threat to their city or world, and they end up in a big battle before realizing they're on the same side.
I would assume the main characters are the Power Rangers themselves. They are the heroes in the Power Rangers franchise.
It could be Dan Kuso from Bakugan as one of the main characters. He could bring his Bakugan expertise to the Power Rangers' team. And of course, the Red Power Ranger could be a main character too, leading the combined efforts of the Bakugan and Rangers.
Without having read 'clash graphic novel', it's hard to say who the main characters are. However, in a graphic novel about a clash, it's likely to have characters on opposite sides of the conflict. There could be a strong - willed leader on one side, and a crafty adversary on the other. Or perhaps it has a young protagonist who discovers the truth about the clash and tries to find a way to resolve it.
Obviously, Yundle and Granpa are the main characters. They could be two old friends who have known each other for a long time and share a lot of memories.
A young artist and a coffee shop owner. The artist is constantly looking for inspiration and finds it in the cozy atmosphere of the coffee shop. The owner, on the other hand, is intrigued by the artist's creativity and they start a friendship that might turn into something more.
Obviously, Spongebob himself could be a main character. He could be on a quest to find the perfect lemon for his grandmother's lemon pie recipe. Patrick could also be a main character, tagging along with Spongebob and providing his own brand of silly commentary throughout the adventure.
It could be a group of cats. One cat could be the curious and adventurous leader, another could be the cautious one always worried about getting into trouble, and the third could be the funny one who always makes the others laugh during their holiday escapades.
One could make a young journalist the main character. They are assigned to write a story about Lady Liberty and in the process, they discover strange occurrences around the statue. Or perhaps a group of activists who use Lady Liberty as a symbol for their cause could be the main characters. They fight for various rights while being inspired by the statue.
Obviously, the chipmunk with speed would be the main character. But there could also be a wise old owl who serves as a mentor to the chipmunk, guiding it on how to control its new speed.