Yuri is an inexperienced sixteen-year-old Flame Haze boy, who wore an unnecessary pair of eyeglasses. He has power to control small animals and insects as a messengers, spies, and measurement, or wrap himself inside them and fly like cannonball. He was a Ukrainian immigrant, whose ship was attacked by one of the Krakens (sea-bound Denizens) during the voyage to America. Near his death he made the contract with Valac and defeated the denizen, but failed to save his family and other passengers. After reaching America, he worked under East Edge. Since he completed his vengeance so quickly, he could not develop the hatred or passion vital for the cause of Flame Haze and he lacked the coolness and rationality needed for survival. He even wished to protect people with his own life, which other Flame Hazes had thought of this idea dangerous, especially East Edge who had forbidden him to engage in combat with enemies.