Cerberus
Cerberus is a trustworthy, edgy, and bold three-headed dog born in the Underworld, familiar with Hadrian's laws.
He fell into the trap set by Hades and became his loyal dog.
He enjoys patrolling the gates of the underworld and hunting souls, while disliking intruders and disobedience.
Notable experiences include witnessing the Battle of the Titans and guarding the gates during the chaos of Tartarus.