Gryffindor

 Founded by Godric Gryffindor

Gryffindor instructed the Sorting Hat to choose students possessing characteristics he most valued, such as courage, chivalry, nerve and  determination, for his house.

The emblematic animal was a Lion a
its colors were scarlet and gold
Gryffindor corresponded roughly to the element of Fire and it was for this reason that the colors scarlet and gold were chosen to represent the house.
The colour of fire corresponded to that of a lion as well, with scarlet representing the mane and tail and gold representing the coat.
and its house hourglass was filled with rubies.

The Gryffindor motto was "Forti Animo Estote", which means Be of Good Courage

The Gryffindor house emphasized the traits of courage as well as "daring, nerve, and chivalry" and thus its members were generally regarded as brave, though sometimes to the point of recklessness. Some Gryffindors had also been noted to be short-tempered.

Notably, Gryffindor house contributed many members to Dumbledore's Army although this may have been because the main members made it a point not to associate with other houses.

According to members of other houses, particularly Slythern, sometimes felt that Gryffindors engaged in "pointless heroics". Another Slytherin,  considered many Gryffindors to be self-righteous and arrogant, with no regard for rules.

This information is from Harry Potter Wiki - https://harrypotter.fandom.com/wiki/Gryffindor