The main characters from the Harry Potter series, Ron, Hermione, Harry, Snape, Dumbledore and Voldemort are the most commonly depicted Harry Potter images and memes. Typically a still image is taken from the movie and used to tell a joke, make a pun or insult one of the characters.
Once Hermione reached about 17 years old, many of the Harry Potter images trending were about how hot she had become and even though Harry Potter was the 'chosen one,' Ron still got the pretty girl. A lot of the funny Harry Potter images are a play on words with spells or their funny wizard names. Some diss Twilight, one of it's biggest competitors in the same market.