Lullaby (Pronounced: Lù~la~bi) is a character which appeared in one of the Amnesia Custom Stories Pewdie played with his girlfriend Marzia. Her character model is actually Pinkie Pie from My Little Pony: Friendship is Magic, and apparently really likes to party. Marzia named her Lullaby, and Pewdie then proceeded to leave her in a pond and then threw her against the wall. She was last seen flying off of a staircase in what was presumably Yoshi's Castle.
During Lullaby's brief stint as a character, Pewdie gave her the voice and personality of Jennifer. Marzia strongly disagreed with this, stating that Lullaby is not Jennifer.