10 Best Harry Potter Characters Who Only Appeared In One Movie Lockhart, Crouch, Fluffy - These short-lived Harry Potter characters left a huge impression. Warner Bros. Some people are here for a good time, not a long time. The Harry Potter movies boast a real hodgepodge of memorable roles. It's a fantasy franchise that lived and died by its rich mythology, and the wealth of significant leading/supporting parts helped solidify that. As the characters' lives evolved, so too did the style and stakes of the series. This kept the plot moving forward but also allowed for plenty of one-off characters to make appearances.