Professor McGonigal
Leslie Phillips
Harry Potter, Hermione Granger, the whole Weasley family (including Arthur and Molly), Lavender Brown, Parvati Patil, Lee Jordan, Neville Longbottm, Dean Thomas, Seamus Finnigan, James Potter, Lily...
A sorting hat is a magical device used by the school to sort first-year students into their respective Houses.
The sorting hat almost put Harry Potter in Slytherin, but he was put to Gryffindor.