Kolbein is a character who is plagued by madness and darkness due to his partially demonic nature. His heart is tainted by rage and resentment, especially towards those closest to him due to the rejection he experienced. His twisted smile and desire to inflict pain on others is indicative of his cruelty and brutality, and his madness also manifests in his desire to drag others down with him. This darkness consumes him, leading him to lose sight of his humanity and become a lost and hollow soul.