Including other members of the Justice Society of America, like Doctor Mid - Nite or Wildcat, would be great. They could train Stargirl further or have her participate in team - up missions. Their different powers and personalities would add depth and variety to the fanfic.
Courtney Whitmore (Stargirl) herself is, of course, essential. But adding characters like Pat Dugan, her step - father, can bring in more family - dynamic elements. He could be a source of wisdom and support for Stargirl in the story.
You could include his sidekick, a witty and agile thief named Lira. She could provide comic relief and also be useful in sneaking around. Another good character would be the wise old wizard, Merlinus. He could offer Arcules advice and knowledge about the magic in the world. And a villain like the shadowy warlord, Zargoth, would be great to create conflict.
You might also consider creating new characters. For instance, a scientist who is a descendant of Victor Frankenstein and is trying to either correct his ancestor's mistakes or continue his work in a more ethical way. Or a journalist who discovers the existence of the monster and decides to expose the story, which would then lead to a whole new set of events and interactions involving all the other characters.
You could have an elderly couple who come in every day for their morning coffee. They've been married for decades and share their love story with the other customers. Then there's the young artist who uses the coffee shop as their studio, sketching the people and the interior. And don't forget the over - enthusiastic coffee blogger who visits the shop to review their drinks and ends up getting involved in the shop's drama. There could also be a street musician who plays outside the coffee shop and sometimes comes in for a free cup of coffee in exchange for a song.
Well, her family members could be great additions. Her parents, for example, could have influenced her in different ways. Also, her siblings if she has any, might be involved in power struggles or family dramas. Another good character could be her loyal servant or bodyguard, someone who has been with her through thick and thin and has some interesting backstory.
Definitely the classic spy archetypes like the suave and experienced agent, the tech - savvy gadget expert, and the tough - as - nails female agent. You could also include a mysterious informant who has connections all over the underworld. This character could provide crucial leads but also be a bit of an enigma, making the spies question their motives.
The Terraria Guide could be a great character to include. He has a lot of knowledge about the Terraria world, so in a crossover, he could be the one trying to figure out the new world they're in. For example, if it's a crossover with Terraria and Hollow Knight, he could study the strange bugs and lore of the Hollow Knight world.
The main character from Pokemon Sun, of course, is essential. You could also add in some original characters, like a mysterious trainer from another region who has come to Alola in search of a specific Pokemon. Professor Kukui can be a great supporting character, providing knowledge and guidance. And don't forget about the Ultra Beasts. You could create a character who has a special connection to an Ultra Beast, perhaps they can communicate with it in some way.
Gwen is an obvious choice. She can bring her magic skills and her relationship with Ben to the story. Also, Grandpa Max, who has a lot of knowledge and experience that can be useful in the fanfic. Another good character could be Kevin, with his ability to absorb materials and his complex relationship with Ben.
Draculaura would be a great character to include. She and Clawdeen could bond over their different yet equally unique monster identities. Also, Frankie Stein would fit in well as she's always up for new adventures and could add an element of chaos. And of course, Clawdeen's family members like her parents or siblings can be included to explore family dynamics.
The Green Goblin is a classic choice. His maniacal nature and his flying glider make for some exciting action scenes. Mary Jane could also be included. Her relationship with Spider - Man is an important part of the Spider - Man lore. And don't forget about Aunt May. She can add some heartwarming and sometimes comical family - related moments to the fanfic.