One spell per character: Ronald Weasley | Cheering Charm

Ron’s the funny guy. In dark times, he can make the others laugh. Without him, the trio wouldn’t work. Harry himself says [when Ron and Hermione are fighting] that although he loves Hermione, hanging out just isn’t as fun without Ron. Ron is a great friend, and can always make his friends smile - and that’s why he’s the Cheering Charm.

“Well, we were always going to fail that one,” said Ron gloomily as they ascended the marble staircase. He had just made Harry feel rather better by telling him how he told the examiner in detail about the ugly man with a wart on his nose in the crystal ball, only to look up and realize he had been describing the examiner’s reflection.