What is a bad friend? It's the kind of friend who doesn't do good things with you. With you, I always get into trouble. With you, you always feel like you are the kind of person who gets the short end of the stick.
Such objects are not uncommon in Gryffindor.
Sirius had one. Called James
James has one, named Sirius
In fact, they also have a bad friend. It's just that bad friend who has them in his hands.
Intention: