In 'How the Grinch Stole Christmas', the main character is the Grinch, a green, furry creature who hates Christmas at first. And the Whos in Whoville are also important characters. In 'Rudolph the Red - Nosed Reindeer', Rudolph is the main character, along with his friends like Hermey the Elf. For 'A Charlie Brown Christmas', Charlie Brown and his dog Snoopy are the central characters.
In 'The Snowman', the boy and the snowman are the main characters. They have a special bond as they fly around and experience the Christmas night. In 'Frosty the Snowman', Frosty is the main character. He's a jolly snowman who loves to have fun and spread joy during Christmas. In 'Santa Claus is Comin' to Town', Santa Claus is the main character, of course, and Kris Kringle, his earlier self in the story, is also a key character.