Dee Dee will sometimes appear in the Office and sing a song to the player. After finishing her song, she may increase an animatronic's difficulty, summon a random customizable animatronic character at a random difficulty, or do nothing at all. She is also able to summon the characters listed below who are not on the main character customization menu:

Shadow Bonnie
Plushtrap
Nightmare Chica
Bonnet
Minireena
Lolbit
The only way of preventing her from .appearing use The “DD repelend “