Neville Longbottom

Neville Longbottom is a fictional character in the Harry Potter series of novels by J. K. Rowling. He is described as a round-faced Gryffindor student in Harry Potter's year. Throughout the series, Neville is often portrayed as a bumbling and disorganised character, and a rather mediocre student, though he is highly gifted at Herbology. However, the character's personality appears to undergo a transition after he joins Dumbledore's Army in Harry Potter and the Order of the Phoenix. The encouragement he receives gives him confidence in his magical abilities, turning him into a more competent wizard. Eventually, Neville becomes the leader of Dumbledore's Army during Harry, Ron and Hermione's absence searching for Horcruxes. Neville is instrumental in the downfall of Lord Voldemort and eventually destroys the final Horcrux, which allows Harry to defeat the Dark Lord once and for all. Neville is portrayed by Matthew Lewis in the Harry Potter films. His evolution from an insecure boy into a courageous leader reflects one of the most profound character arcs in the series.