Fluttershy could also be included. Imagine a scenario where Trixie is trying to put on a big, bold magic show and Fluttershy's timidness contrasts with that. Twilight might be caught in the middle, trying to make sure Fluttershy doesn't get too scared and that Trixie doesn't feel like her show is being ruined.
Rainbow Dash is another excellent choice. If there's a race or a challenge that involves magic and speed, Rainbow Dash's competitive spirit could drive the story forward. She could also be the one who challenges Trixie and Twilight to prove their magic skills in a more physical or action - based way.
Well, Dr. Wells could be an important character. He might have some knowledge or secrets that are relevant to the story of Barry and Caitlin. His presence could add a sense of mystery and also some conflict. Another option is Killer Frost. If Caitlin is struggling with her alter - ego, it could be a major plot point and Killer Frost could interact with Barry in unique ways.
Hinata could be included. Her gentle nature could have a positive impact on Inari, and she might be able to teach him some of her own ninja techniques. Shikamaru could also be part of it. His intelligence would be valuable in planning strategies, whether it's for defending the Land of Waves or dealing with other threats. Also, Tsunade, as she could offer her leadership and medical expertise if needed.
Pendergast would be an interesting character to include. His strict and by - the - book nature could contrast with Luci and Elfo's more laid - back and unorthodox ways. He might try to stop their adventures or get in their way, adding some tension to the story.
The enchanted objects in the castle like Lumière and Cogsworth would be great. They add humor and charm to the story. Also, Gaston could be included in a different way, like he has a change of heart and tries to help them. And Belle's father could also be a key character, perhaps he discovers something important about the curse.
Well, they could have a wise old mentor figure. This person could be an older neighbor who has lived through a lot and gives them valuable advice when they face difficulties in their relationship or in their adventures.
For a more villainous touch, including Voldemort or his followers could create high - stakes situations. Bellatrix Lestrange could be a terrifying adversary for Harry and Gabi. On the other hand, adding new original characters, like a powerful but reclusive wizard who lives in the Forbidden Forest, could also make the story more exciting.
Definitely Cristina Yang. She has such a strong personality and her interactions with Callie and Arizona could add a lot of spice to the fanfiction. Her no - nonsense attitude and brilliant surgical skills could create interesting storylines, like when she might compete with them in a surgical competition or give them some tough - love advice on their relationship.
Arya could be a great addition. She has her own set of skills and knowledge that could add depth to the story. Murtagh is also an interesting character. His complex relationship with Eragon and his own journey could bring in a lot of drama. Nasuada, with her leadership skills and strategic mind, could play a crucial role in any fanfiction scenario. For example, in a story where there is a war, Nasuada could be leading the troops while Eragon and Saphira are dealing with a magical threat.
Mario could be a great addition. Since Luigi is Mario's brother, his presence could add some family - related drama or comical moments. Sonic could also be included. As Tails' friend, Sonic's brash and confident personality would contrast well with Luigi's more timid nature.
Jacob could be a great addition. He has a complex relationship with Bella in the original series. In fanfiction, his interactions with Charlie could be explored further. For example, how Charlie reacts to Jacob's wolf - shape - shifting abilities and his love for Bella.