Romeo's mom from 'Romeo and Juliet'
Famously, six people die because of Romeo and Juliet’s misguided dalliance, including Romeo and Juliet themselves. Then there’s Mercutio, there’s Tybalt, there’s Paris… and that leaves one more. That person is Romeo’s mom, Lady Montague, who dies of grief at some point. It has little to no impact on the play, and it's never really mentioned again. I feel like Shakespeare definitely killed her off because "Five people? That’s not enough people to satisfy my personal bloodlust. But SIX PEOPLE? Boom. Solid."