Lycaon

"You prioritized saving Lavinia Reni above all else. Saving that witch was not one of the choices you provided. Therefore, she was quietly slayed. If you wish to choose what to slay, you should expand your awareness of the blade further. You must be aware, or your blade will just indiscriminately chop up everything."

- Lycaon to Tobio.

Lycaon was the former King of Arcadia described as being the true ancestor of werewolves after being cursed by the Greek God, Zeus, then sealed inside one of the Longinus Canis Lycaon.

Appearance
His appearance before being sealed inside of the Longinus, Canis Lycaon is unknown. However, it was stated that he was a human before being turned into a werewolf.

Personality
Lycaon was known for his wickedness, having committed atrocities against the Chief God of Greek mythology Zeus, so much he was cursed into a werewolf as punishment. Lycaon is shown to be ruthless and pragmatic, as he tried to negatively influence his current host Tobio into discarding his compassion and humanity such as criticized him for trying to save a possessed Lavinia instead of outright killing her and Augusta. Lycaon is shown to be honorable as when Tobio succeeded in saving Lavinia while resisting his influence, he was solemnly impressed with his willpower and determination and thus warned Tobio to mastered his Ancient Gear if he does not wished to kill indiscriminately.

History
In the past, Lycaon was the King of Arcadia, a paradise before he committed several misdeeds against the Chief-God, Zeus. Because of this, he was cursed and turned into a werewolf, dubbed the Arcadian Evil King and True Ancestor of Werewolves. At some point, he was captured and sealed inside of the Ancient Gear Canis Lycaon alongside the Ame-no-Ohabari, which turned it into a cursed blade.