Hermione Granger doesn’t tolerate injustice—so much, in fact, that she established S.P.E.W., the Society for the Promotion of Elfish Welfare, which fought for the equality of house elves. This was prompted by an act of great injustice that she saw in the 1994 Quidditch World Cup, whereby Barty Crouch treated the family’s house elf Winky cruelly.