There might also be new characters created specifically for the fanfic. These could be hybrids of the two universes or characters that are designed to bridge the gap between Shrek's world and Sonic's world. They could play important roles in the plot, like being the ones who bring Shrek and Sonic together in the first place or being the key to solving the problems that arise during their adventure.
Well, another concept might be their character interactions. Shrek is known for his gruff and somewhat cynical nature, while Sonic is more of a heroic and energetic character. Their conversations and how they learn from each other could be a great part of the fanfic. For example, Sonic could teach Shrek about the importance of speed and quick thinking in certain situations, and Shrek could show Sonic the value of taking things slow and enjoying the simple things in life.
The main characters in the story Shrek tells are himself, Fiona, their kids, Donkey and Puss in Boots. They all play important roles in the Christmas - themed story in 'Shrek the Halls'.
Knuckles could also make an appearance in Sonic the Merhog fanfics. He might be guarding some underwater treasure or ancient relic. Sonic has to convince Knuckles that they need to work together to protect it from a common enemy, like a group of pirates who are trying to steal the underwater treasure.
Peppa Pig and Shrek would be the main characters for sure. But also, George, Peppa's little brother, could play an important role. Maybe he gets into some trouble in Shrek's swamp that forces Peppa and Shrek to work together. And on Shrek's side, Donkey could be involved too. Donkey's chatter could add some humor to the interactions between the two different sets of characters from Peppa's world and Shrek's world.
Well, if it follows the pattern of the Shrek series, Shrek himself would be a main character. And of course, Fiona, his wife. Donkey and Puss in Boots would likely also be main characters as they are Shrek's closest friends.
The main characters in Shrek 2 story are Shrek, an ogre, and Fiona, his wife who was once a princess. Also, there's the Fairy Godmother who tries to disrupt their relationship. And Puss in Boots, Shrek's friend, is another important character.
There are several main characters in Shrek 3. Shrek, of course, is the ogre hero. Donkey, his chatty and loyal friend, is always by his side. Puss in Boots, the swashbuckling cat, adds a lot of charm. King Harold, who is ill and whose throne needs a successor. Prince Charming, the antagonist who wants to rule the kingdom. And Arthur, the young boy who ends up being the new heir.
In the 'Shrek novel', Shrek is the main character, a big green ogre who just wants to be left alone in his swamp. Donkey, a small but very vocal animal, becomes Shrek's friend. Princess Fiona, a beautiful princess with a hidden side, plays an important role. And Lord Farquaad, the villain of the story who disturbs Shrek's peace and forces him to embark on a journey. There are also other fairy - tale characters that appear throughout the story, but these four are the main ones that drive the plot forward.
The main characters are Shrek, an ogre; Donkey, Shrek's chatty friend; Princess Fiona; and Lord Farquaad.
Fiona Lemon is another main character. She might have her own unique set of skills or traits that complement Sonic's. She could be intelligent, brave, or have some special power that helps in their adventures together.