Percy Jackson and the Olympians: Legends

Krios is about ten feet tall, wearing black (possibly Stygian Iron) armor with stars on it, while his helmet it shaped like a ram's head with horns on it.

Krios is revealed to be constantly gloomy, thoughtful, silent and uncommunicative. He would frequently stand for days on end and watch constellations, while deep in thought. Krios is also certainly as cruel and arrogant as his other Titan brethren but not as brutal as Hyperion. He also feels that his abilities are somewhat overshadowed by those of other Titans such as Hyperion, who can burst into flames. And yet, it was still considered impressive that Jason defeated him, though this could just be because he is an immortal Titan.

Years ago, Krios was at Mount Othrys watching the scenes of wars next to Hyperion. He talks to his brother about the war and then starts to pout due to Hyperion being able to burst into fire and he having to have ram horns and being Lord of the South. After the defeat of Kronos in Manhattan, Hermes mentions him running away and Mount Orthrys being destroyed, though it was actually destroyed by the Romans. Hermes's reason for not revealing the truth was due to the separation of the two camps.