Cerberus

Cerberus are Monsters that can be summoned.

Appearance
A massive three-headed dog. They are jet-black, with ears as pointed as fangs.

History
Phan Bertholda summoned a Cerberus while trying to escape the Count Bourne's party with the Mermaid's Tear and Emma.

The monster fought against Leila and the Lahmu Guild top adventurers until it was killed by Noir, using the Blade of Divine Punishment.