Ron Weasley- Harry's best and closest friend, is terrified of spiders, and crashes into the whooping willow with Harry

Hermione Granger- Harry and Ron's other friend, extremely smart, turns into a cat when they try to use the polyjuice potion

Dumbledore- Headmaster of Hogwarts

Hagrid- The gamekeeper of Hogwarts, is accused of opening the chamber of secrets after he was accused as a child. Is taken away by the cops

Ginny Weasley- Ron's younger sister, finds Tom Riddles's diary and writes to him in it, opens the chamber of secrets, has a crush on Harry

Tom Riddle- Writes to Harry and Ginny in his Diary, turns out to be Voldemort in the past, fights Harry with a giant Basilisk in the chamber of secrets

Draco Malfoy- Antagonest, Harry and friends' bully, is annoying

Dobby- The Malfoys house elf who warns Harry not to return to Hogwarts and closes the platform to try and prevent him from going, is set free at the end of the book due to Harry tricking Lucius into giving Dobby a sock

Moaning Myrtle- The ghost that resides in one of the school's girls bathrooms, is always moping and crying

Professor Lockheart- This year's defense against the dark arts teacher, full of himself, made up all the stuff he wrote in his books, loses his memory in the chamber of secrets

Hogwart- The wizarding school that Harry and his friends attend, most of the story takes place here

Chamber of secrets- Where the ending of the book takes place

Myrtles bathroom- The bathroom where Moaning myrtle resides. Where the chamber of secrets is found