Cerberus is the third Demon encountered in Helltaker, and although Cerberus has three bodies, there is only one soul living within and controlling all three of them. They are referred to as "The Triple Demon."

Cerberus, upon first meeting in the Underworld, is one of the more excitable demons with a happy-go-lucky attitude, as evidenced by their almost always smiling sprites and their enthusiastic dialogue. Cerberus, while at first seeming relatively innocent compared to the rest.