Flick could also be involved. He is one of Ralphie's friends. Maybe they are together outside the school, sharing stories or engaging in some typical kid behavior like daring each other to do something silly. Their interactions outside the school contribute to the overall narrative of the movie and the friendship dynamics among the boys.
I don't know who is involved in 'the outside story' as the term is quite vague. It could be anyone from a group of hikers in a mountain adventure to people living in a neighborhood and their outdoor interactions.
Santa Claus is a main character. He is the jolly figure who brings presents to children all over the world. Then there are the elves, who are his little helpers in the North Pole workshop, making all the toys. Mrs. Claus is also often part of the story, taking care of things at the North Pole while Santa is out delivering gifts.
The main characters in this journey are the wise men. They came from afar, following the star to find Jesus.
Obviously, Sailor Moon (Usagi Tsukino) is one of the main characters. She is always at the center of the action in Sailor Moon stories, and Christmas Stories would be no different. Mamoru Chiba would also be involved as he is an important part of Usagi's life.
The main characters are of course the Simpson family. There's Homer, the bumbling but loveable father. Marge, the patient and kind mother. Bart, the mischievous son. Lisa, the intelligent and musically - inclined daughter, and Maggie, the cute baby. They are at the center of all the Christmas stories in this special.
It really depends on the specific fanfiction. It could be a brave paramedic who is constantly administering adrenaline shots to save lives in the field. Or perhaps a scientist who is researching the effects of new - generation adrenaline shots and becomes the main character in a story full of scientific intrigue.
There was a janitor who was one of the first to notice the strange happenings. He would often find things out of place in the early morning.
The main characters would include Kurt Hummel. He would probably be in charge of the decorations, making the dinner area look fabulous. Mercedes Jones would be there, bringing her amazing voice and her big heart. Puck would also be involved, maybe causing a little bit of chaos at the dinner table but in a fun way. And Quinn Fabray, who might be reflecting on how much her life has changed since last Christmas.
The main characters are of course the Simpsons family, including Homer, Marge, Bart, Lisa and Maggie.
The main characters of 'A Christmas Story Christmas' are Ralphie, of course, as well as his siblings, his parents who are trying to make Christmas special, and a few of his close friends who contribute to the fun and excitement of the holiday.