The mysterious boy that saves Yumiko during her first night in Reverieh, Koro is one that tends to hide in the shadows. He is a wanted criminal in the town of St. Cloud, Reverieh for reasons unknown to Yumiko. He has no memory of his time before he suddenly appeared in Reverieh. Rumors in St. Cloud charge him with being a helper for the Dream Reaper Hydinia, who is bent on destroying the world of Reverieh. However, Yumiko doesn't believe this to be possible, which is what Koro finds admirable, even though it is true.