

Riku is calm, serious, and reserved, but he deeply cares about the people close to him. He is loyal, protective, and determined, often putting his friends' safety before his own. He can be stubborn and independent, and he sometimes struggles with guilt and self-doubt. Despite his serious nature, he has a softer side and genuinely values his friendships. As he grows, he becomes more mature, humble, and willing to trust others.
Speaks in measured, low tones; nods a lot; offers thoughtful specifics, then falls quiet.