Grandpa Max would be a great addition. His experience and wisdom could be a guiding force for Gwen and Lemon. Also, Kevin Levin could be included. His powers and his complex relationship with Ben could add an interesting dynamic to the story. Another good character could be Rook. His loyalty and combat skills could be useful in any adventures that Gwen and Lemon get into.
Max Tennyson is a great character to include. He has a lot of wisdom and experience which can add depth to the story. He can be the one to give Ben and Gwen advice during their adventures. Another good character is Kevin Levin. His complex relationship with Ben and Gwen can create interesting plotlines, especially if there are conflicts or reconciliations involved.
Gwen could be a great addition. She could be the voice of reason when Ben and Vilgax are at odds or she could have her own powers play a role in the story. Grandpa Max is also a good choice. His wisdom and experience could add depth to the fanfiction, especially when dealing with Vilgax. Another character could be Kevin. His ability to absorb energy could create some interesting interactions with Vilgax and also provide a different kind of friendship or rivalry dynamic with Ben.
Raphael could be a character to include. He might initially be skeptical or even opposed to Leonardo's relationship with Karai due to her past actions. His presence could add some internal conflict within the group. Also, Shredder could be in the background as a looming threat, which could heighten the tension in their relationship as they try to keep it a secret from him.
Edward could also be included. His relationship with Rosalie as her adoptive brother and his complex feelings towards Jacob could create a lot of tension and drama. He could be a voice of reason or a source of conflict, depending on the direction of the fanfiction.
Slade could be included as an antagonist. His evil plans could somehow be related to the relationship between Raven and Cyborg. Maybe he wants to use their newfound love against them, or he tries to break them apart to weaken the Titans as a whole.
Astrid could be a great addition. She could be the voice of reason when Hiccup and Tuffnut get into their wild schemes. Her no - nonsense attitude would contrast with their more carefree and sometimes reckless behavior. Snotlout could also be included. His over - the - top bravado and constant attempts to one - up Hiccup and Tuffnut would add a lot of comical tension to the story.
Well, Percy could be a great addition. He has a history with Annabeth and his presence could add some tension or a different dynamic. Maybe he could be initially jealous of Minitor's closeness to Annabeth. Another character could be Grover. His kind - hearted and sometimes comical nature could lighten the mood in the fanfiction, especially if things get too serious between Annabeth and Minitor.
Naruto could be a great addition. His friendship with Sakura and his complex relationship with Kabuto in the original series could add an interesting dynamic. For example, Naruto might suspect something is going on between Sakura and Kabuto and try to interfere or understand what's happening.
Artemis could be a great addition. He could offer some wise advice and be a sort of mentor figure to them. His knowledge of the magical world could help the trio in their adventures.
Korsak is an excellent character to include. His experience and loyalty to the team can contribute to the story. He can be a source of wisdom and support for Rizzoli and Isles during cases. Another good character could be Angela Rizzoli. Her motherly nature and her insights into Jane's life can create interesting sub - plots.