Founder : Godric Gryffindor
Gryffindor is said to have praised courage, determination, and strength of heart above all other qualities. He also was the most in favour of allowing Muggle-borns into the school. He was initially a close friend of Salazar Slytherin, but over time their friendship deteriorated, making the houses enemies. "Godric Gryffindor was the most accomplished dueller of his time, an enlightened fighter against Muggle-discrimination and the first owner of the celebrated Sorting Hat."
His known relics are a goblin-made sword adorned with rubies and the Sorting Hat. The two items share a particular bond: whenever a "true Gryffindor" needs it, the Sword will allow itself to be pulled out of the hat. Both relics play an important part in the saga.
Animal : Lion
A lion is a carnivorous mammal. It is the second-largest living cat after the tiger. It is the mascot of Gryffindor House at Hogwarts School of Witchcraft and Wizardry as it represents courage and chivalry, the two most pronounced traits of a Gryffindor. In addition, Luna Lovegood made a hat in the shape of a lion's head, and would wear it at all Quidditch games between Gryffindor and Slytherin Houses, to show her support for Gryffindor, over Slytherin.
At the 1994 Quidditch World Cup, the scarves for those supporting Bulgaria were adorned with lions that really roared.
Colors and Traits
Color : Crimson red and gold
Traits : Bravery, nerve, Chivalry, Courage
With a lion as its crest and Professor McGonagall at its head, Gryffindor is the house which most values the virtues of courage, bravery and determination.
Ghost : Sir Nicholas
Sir Nicholas de Mimsy-Porpington, known after his death as Nearly Headless Nick, (d. 31 October, 1492) was a wizard who attended Hogwarts School of Witchcraft and Wizardry and was Sorted into Gryffindor House. He was a wizard of the royal court as an adult. He was executed by an improper decapitation, after he had a magical mishap with Lady Grieve, in which he tried to straighten her teeth but it backfired and she grew tusks. Since then, he is the resident ghost of Gryffindor Tower at the Hogwarts Castle. Sir Nicholas chose to linger as a ghost rather than "go on", because, by his own admission, he feared death. He became the resident ghost of Gryffindor Tower at Hogwarts School of Witchcraft and Wizardry. "Nearly Headless Nick", as he was called by the majority of the student body, was always happy to point new Gryffindors in the right direction when late to class.
Head : Minerva McGonagall
Head of Gryffindor House, Transfiguration professor, and later Headmistress at Hogwarts, where she began teaching in December 1956. McGonagall is described as a tall, rather severe-looking woman, with black hair typically drawn into a tight bun. She wears emerald green robes, a pointed hat, and always has a very prim expression. She speaks with a slight Scottish accent. She is, according to Rowling, a sprightly 70-year-old. she has the distinction of being the first Animagus introduced in the series and being one of the few registered Animagi of the century, though she was rarely seen using the ability. It is revealed in Order of the Phoenix that McGonagall is a member of the Order of the Phoenix. After the death of Dumbledore in Half-Blood Prince, she becomes the acting Headmistress of Hogwarts.
Place (Common room)
The common room is a circular room where Gryffindor students can relax after a long day of studying. It is full of squashy armchairs, tables, and a bulletin board where school notices, ads, lost posters, etc. can be posted. A window looks out onto the grounds of the school, and a large fireplace dominates one wall. The walls are decorated with scarlet tapestries that depict witches and wizards, but also various animals. It is usually where celebration parties are held after Gryffindor Quidditch victories, or when Harry Potter completed a task for the Triwizard Tournament. The Gryffindor dormitories are also located in the Tower, with two doors leading off from the common room that open to spiral staircases. One of them leads to the girls' dormitory, the other to the boys'. The stairs to the girls' dormitory are enchanted to become a slide if any boy attempts to climb them, but not vice versa, since it was deemed that girls were more trustworthy than boys, and Hermione Granger went into the boys' room on several occasions.
Entrance
The entrance to the common room is located behind the portrait of the Fat Lady at the end of the Fat Lady's Corridor on the seventh-floor of Hogwarts Castle. A password is required to enter it. A circular hole is behind the painting leading to the common room.
Reputation
Gryffindors and Slytherins have shared a fierce house rivalry since their founders, Godric Gryffindor and Salazar Slytherin, respectively, had a severe falling out over Slytherin's emphasis on blood purity which Gryffindor felt was wrong. There might also be an element of feeling wronged; as Harry and his fellow Gryffindors tend to win in a lot of circumstances which, when viewed from a Slytherin's point of view, may be considered unfair. Examples of this include the last-minute points awarded by Headmaster Dumbledore at the Leaving Feast, which conveniently put Gryffindor ten points ahead of Slytherin in the 1991–1992 school year, the fact that no points were deducted for the rule breaking that happened during that night and Harry being permitted by Professor McGonagall to have his own broomstick for the Gryffindor Quidditch team, even though first-years are not normally permitted their own broomsticks because of danger. Overall, however, the houses of Ravenclaw and Hufflepuff tended to side with Gryffindor in its rivalry with Slytherin. This was particularly notable during the Second Wizarding War — the members of Dumbledore's Army were from Gryffindor, Hufflepuff, and Ravenclaw, but lacked any Slytherins (This may be because they were not notified of the Army's creation as it came through word of mouth and they did not seem to associate with many or any Slytherins), but during the Battle of Hogwarts, the Slytherin students were forced to leave while many students from the other three houses remained behind to fight against Lord Voldemort.