Gryffindor house (I am a Gryffindor, you know) emphasizes courage, daring, nerve, bravery, strength of will, and chivalry. In the Harry Potter series, Gryffindor is the most romanticized house because Harry is a Gryffindor. In the story, when Gryffindors are put into a negative light, they are characterized as just kind of boisterous and just generally cocky, overconfident jerks. However, in times of trouble, Gryffindors have the nerve and the chivalry to protect and defend their friends. Though, Gryffindors do not always act in others’ interests, as we find with Gilderoy Lockhart, who is narcissistic and vain and who only wanted attention, and Peter Pettigrew, who betrayed his friends—so this trait is not true for everyone. Often Gryffindors commit brave acts of chivalry and courage simply to be the hero and glorify themselves. In the Battle of Hogwarts, not all Gryffindors stayed to defend the school and life as they knew it. Some stayed to support others, and some stayed to glorify themselves in battle, but some did not. This is a less glorious trait of Gryffindors, but even still, some would argue that the motive of the action is not what determines the morality and the goodness of the action. Regardless of the motive and the action, even if it is partially to glorify yourself, you should defend your loved ones in the way that Ron Weasley defended his own friends in all sorts of confrontations, and in the way that Hermione Granger stood up for the rights of the house elves. Ron risks his life so that Harry and Hermione may advance towards the Sorcerer’s Stone, and he defends Hermione from the berating of Professor Snape before he even knew her. Gryffindors are supportive in that they are loyal, and will likely risk their lives to help their friends.
Ravenclaw house emphasizes intelligence, wit, wisdom, creativity, originality, individuality, and acceptance. In the academic sense, Ravenclaws are fiercely competitive and even prone to backstabbing. Where Ravenclaws are supportive, they are supportive of individuality, and they celebrate each other’s differences. A fantastic example of this is Luna Lovegood. Luna, a social outcast herself, is perhaps one of the most supportive characters in the series. She provides support and understanding to Harry when Umbridge takes over the Defense Against the Dark Arts program, and when Harry decides he must train others to defend themselves against dark wizards. When Luna is imprisoned at Malfoy Manor with Dobby the house elf, she treats him with as much respect as she would anyone else, as well as Ollivander, a very elderly man who may not have survived imprisonment had Luna not been there to help him and to talk to him and keep his spirits up. Luna is an unusually kind human, and her case is not a common one among Ravenclaws, except in the fact that she is accepting. Luna’s unconditional acceptance of others, no matter who they are—no matter what species or race or age—is reflective of her belonging to Ravenclaw house. Ravenclaws support others by accepting them for who they are, unconditionally.