Cerberus the Ice Guardian is the Gatekeeper of the entrance to the Temen-ni-gru, chained up and sealed away by Sparda. He is the boss of Mission 03 of Devil May Cry 3: Dante's Awakening.
In the Devil May Cry HD Collection, the player will achieve the award "Man's Best Friend" for defeating Cerberus.
When Dante first enters the tower, he finds Cerberus at the entrance in the Ice Guardian's Chamber. Cerberus demands he leave, and then attacks when Dante mocks him. After being defeated, Cerberus willingly relinquishes his soul to Dante as a Devil Arm
Cerberus is a three-headed hellhound willing to grant power to the worthy. He has the power to control ice, which he uses to encase himself in ice armor, summon showers of icicles, and belch small icebergs. Each of his heads uses different techniques. Also his hind paws seem to be missing and replaced with ice this can be spotted when Cerberus lunges his head(s) at the player.