Bertha Jorkins

Her greatest pride at Hogwarts was being the school informer. She knew all the juicy gossip, all the shocking scandals. It wasn't much, she certainly didn't have the brains of Lily Evans, but it was something to be proud of.

So when she begins to struggle to remember even the simplest things, it scares her. She doesn't remember why, but somehow, she's become incredibly forgetful.

Of course, by the time Voldemort manages to lift the Memory Charm, she's been tortured severely, but having her memory back makes it all worth it. She's still smiling when the Killing Curse hits her.