Who are the best characters to include in Dipper and Mabel love story fanfiction besides them?

Bill Cipher would be an interesting character to involve. If he shows up, he could be even more manipulative towards Reverse Dipper and Mabel. His chaotic nature could create a lot of conflict and drama. Reverse Dipper might be more vulnerable to Bill's tricks or perhaps more resistant in some unexpected ways. And Mabel would have to use her wits and kindness to try to counter Bill's evil plans.

Metro Man could be a great addition. His presence could add some tension or an interesting dynamic, especially considering his past relationship with Megamind. Minion, Megamind's loyal sidekick, is also a must - include. He could provide comic relief and his unique perspective on Megamind and Roxanne's relationship. And maybe the Warden, who could be involved in some sort of prison - related subplot or just add to the overall chaos in the story.

Sasuke could be a great addition. He might initially be skeptical of Naruko's newfound bond with the Kyuubi, but then come to see the potential in it. Kakashi could also be included as he has a lot of knowledge and experience. He could offer guidance to Naruko on how to handle the Kyuubi's power. Another good character would be Jiraiya. He could have some interesting insights into the relationship between Naruko and the Kyuubi, having known about the Kyuubi for a long time.

The King and Queen of the kingdom. Their presence can bring in the political and parental aspects. They might have different views on how Rapunzel and Cassandra should handle certain situations, which could create more conflict and plot twists.

Nendo could be a great addition. His simple - minded nature can add a lot of humor. For example, he could misunderstand the relationship between Saiki and Kaidou and try to get in on their 'adventures' in a really clumsy way.

Well, one character that would be interesting to include is Commissioner Barbara Gordon. She has a long history with the Batman universe and can serve as a link between the old and new. In addition, Brother Eye could be a great addition. It's a powerful and complex entity that can create all sorts of plot twists. And don't forget about Inque. Her shape - shifting abilities can make for some really exciting and unpredictable story elements when combined with Batman and Barda's story.

Lapis Lazuli could be a great addition. She has a complex relationship with Peridot, and her presence could add some drama and depth. For example, she might be initially suspicious of Steven and Peridot's friendship, thinking that Steven is influencing Peridot too much. But over time, she could come to see the positive aspects of their bond.

Hans could be an unexpected character to include. Maybe he has reformed and comes back to Arendelle to seek forgiveness. His presence could create some tension and also an opportunity for Anna and Kristoff to show how strong their relationship is. Additionally, some new characters from neighboring kingdoms could be introduced to add more political and cultural elements to the story.

Goku could be a great addition. Maybe he could offer some advice to Vegeta about his tail based on his own Saiyan experiences. Another good character would be Trunks. He could be involved in a story where he discovers something new about his father's tail.

Well, in addition to Tinkerbell and Peter Pan, including the fairies from Pixie Hollow would be amazing. They could come to Neverland on a special mission and interact with Tinkerbell in different ways. The Lost Boys are essential as they are part of Peter Pan's crew. And of course, Captain Hook. His presence always spices up the story with his evil plans and his rivalry with Peter Pan. You could also consider including the crocodile that chases Hook around. It could add an element of danger and suspense.