He is an undine with blue hair and yellow eyes. He wears a black shirt with blue highlight and same design trousers. He uses a silver belt and carries his blade on his back with a belt slung across his chest.
He joined New ALO sometime around 2025 and joined the League of Darkness Knights shortly afterward.
Kalius has shown notable ability wielding his scimitar. He's shown skill in water and ice magic, though his skill can't be compared to the one of Sabrac.