There is a Good Doll and an Evil Doll.
And they are girlfriends.
The Evil Doll doesn’t talk much because almost everything she has to say sounds hostile and is often deeply disturbing to everyone around her. Disturbing people makes the Good Doll sad, so she just holds her girlfriend’s hand and lets her do all the talking.
The Good Doll herself is never bothered by anything her love has to say, of course. She knows even the harshest words are meant with affection, and the Evil Doll’s actions toward her have only ever been sweet.
Once, a cruel person made the Good Doll sad.