The Origin Of The Chamber Of Secrets

Helga Hufflepuff: 

Kind woman who valued loyalty, hard workers and patience. She believed that anyone who didn’t fit in should have a place where they were welcomed, allowing others who didn’t show these traits to be part of her house. She owned a golden cup and brought house elves to Hogwarts.

Salazar Slytherin:

Intelligent woman who valued intelligence and sharpness above everything else. She believed Hogwarts needed bright minds that had to be taught in order to make Hogwarts the best wizarding school. She owned a diadem that no one alive had seen because it was lost.

Godric Gryffindor: 

Brave man who valued bravery and courage. He believed anyone who showed magical powers before 11 should be let into Hogwarts. He had a sword that would present itself to a true Gryffindor when they were in need of it. 

Rowena Ravenclaw:

Cunning man who valued ambition. He believed that anyone who was not of pure blood descent did not belong in Hogwarts. He created the Chamber of Secrets that was his hidden place for people who he viewed worthy.