Leviosa

A character discussion around the authority figures of Harry Potter and the different ways in which things they experienced when they were young colored their judgment and actions during the series. There has been plenty of conversation around Snape, obviously... However, Snape is not alone in allowing past experiences to decide future actions. Hagrid, Petunia Dursley, Sirius Black and Albus Dumbledore are some characters that come to mind.