Basilisk (Harry Potter)

The Basilisk made an appearance in ''Harry Potter and the Chamber of Secrets. ''It lived in the Chamber of Secrets until Ginny Weasely (possessed by Voldemort) opened the Chamber of secrets. The Basilisk escaped inside the school and petrified a few people:

-Mrs. Norris

-Justin Fletch Fletchly

-Nearly Headless Nick

-Hermione Granger

-Colin Creevey

Harry Potter was thought to be responsible for this event because he was able to speak Parselmouth wich was an ability of Voldemort and the great Salazar Slytherin. Although, when Hermione Granger became petrified everyone started to think otherwise 'cause she was Harry's best friend. Harry and Ron went to the spider Aragog who told them how to get into the Chamber of Secrets and Harry was able to beat the Basilisk and save Ginny from Tom Riddle who seemed to be a younger version of Voldemort.

Trivia
The Basilisk isn't a male, it's a female. Yes it's a girl.