The Goo is the side-villain of the show, she lives along with Sacrificer in The Sacrificer Woods. She is a seemingly sweet servant made out of slime, but she is secretly sick in the head. She loves Sacrificer so badly that it causes her to feel like she has to kill everyone who takes up hers and Sacrificers
time together, and that includes the sinisters.
She loves Sacrificer and everything he does, but absolutely hates the sinisters and everything they do.
The Goo was created by Sacrificer with the help of putty, a wig and fake eyes, teeth and nose. Including clothes as well, of course. However, the first design of her servant dress did not have the 'bon-bons' exposed, that is a piece of the dress that The Goo cut away to try and gain the attention from Sacrificer.
The Goo is (like most others in this show) A Dumblotraight. But, she was hand made.
The voice actor for The Goo is Samuel Meza.