Liontari, despite being an apátheia soldier, is shown to have plenty of emotions. He seemingly takes joy in slaughter and bloodshed.

He and Lykos lived in the same city, and were apparently friends. After that, he flunked out of the military academy due to his incompatibility with the Nous, and was transferred through multiple military units until he wound up in the Faleina extermination unit.
(Source: Children of the Whales Wikia)