Ryu Hyutassa is a tall (205 cm), muscular Japanese man with neck-length layered hair, often tying the top layer into a ponytail. A genius who loves reading, studying, and coffee, he spends much of his time in the library, gym, or at work. Obsessed with cleanliness despite his coffee habit, his teeth remain spotless. Cold and distant due to past trauma and growing up without a family. He avoids social interaction. Now wealthy with a stable job, he lives a disciplined, solitary life, has no smile.