Finn Hudson could also be a main character. He could be the one who has some initial reservations about the whole royal welcome thing but then slowly gets into the spirit of it as he sees how much it means to the other members of the Glee club.
Another possible main character could be Sue Sylvester. She might be against the idea of the royal welcome at first, thinking it will distract the Glee club from their regular competitions. But as things progress, she might find a way to use the royal connection to her advantage in some comical or unexpected way.
The plot might involve one of the Glee characters having a special connection to the royalty. For example, a character discovers they are distantly related to the royal family. This leads to a series of events where they are welcomed into the royal circle and the rest of the Glee club experiences the grandeur of the royal world along with them.
A prince and a foreign diplomat's daughter. The prince's family arranges an engagement with her to strengthen relations with her country. However, she is a strong - willed and independent woman who challenges the prince's traditional views at first. As they interact more during the engagement preparations, they start to understand and love each other.
The children of Rachel and Finn could be main characters. Maybe their son or daughter inherits Rachel's amazing singing talent and Finn's charm. They could struggle with living up to their parents' legacy in the glee club.
Barry Allen from The Flash and Rachel Berry from Glee could be main characters. Barry's speed could be used in interesting ways, like helping Rachel get to auditions on time or saving her from some danger in the city. They could form an unlikely friendship and be at the center of the story.
Mr. Schuester from Glee could be a main character too. He could be the one who tries to bring the two groups together, seeing the potential in the Glee club and Supergirl working as a team. His role as a mentor in Glee could be extended to Supergirl as she tries to navigate the more complex aspects of human relationships and teamwork in this crossover fanfiction.
Typically, the substitute teacher would be one of the main characters. They are likely to be the central figure around which the story revolves. And then, some of the students from the 'Glee' club would also be main characters. For example, characters like Rachel, Finn, or Kurt who are very prominent in the original 'Glee' series. Their interactions with the substitute would form the core of the story.
It could be some of the well - known characters from 'The Empire' who take on new roles in the context of the Glee club. Maybe Lucious Lyon could be one, bringing his strong - willed and often controlling personality into the club and causing some chaos.
There might also be characters that are minor in the original but become more prominent in the fanfiction. They could be given more complex personalities and important roles in the 'gloaming glee' story.
The royal couple would be main characters. For example, if it's a story about a new generation in the wizarding world, the prince or princess could be the children of some well - known wizarding families. Neville Longbottom could also be a main character. He could be the one in charge of the herbological arrangements for the wedding, given his expertise in Herbology. And Luna Lovegood could add her unique perspective, maybe she's a bridesmaid and brings some of her strange but endearing charm to the event.
Harry Potter himself could be one of the main characters. He could interact with the Royal Marines, learning from their discipline and sharing his magical knowledge. Another could be a tough Royal Marine sergeant who has to adapt to the magical world.