Manipulation of Nuclear Fusion, Manipulation of Hell Blazing Fires (before she obtained the Nuclear power)
Regulator of the flames in the Former Hell of Blazing Fires
- (Touhou 11, 12.3, 12.5) Long raven-dark brown hair. Wears a white short-sleeved shirt with a red "eye" in the center, a short green skirt, and a green hair-ribbon. On her right arm, she wears a device known as the "Third Leg", which appears to regulate the power of the devices on her legs (aka a control rod, though it has been referenced as an arm cannon by many fans and is used as one in Hisoutensoku). She wears a cape that's white on the outside and a starry pattern on the inside; the cape is kept aloft by her black wings. Her right foot is encased in congealed matter, representing the "elephant's foot" of Chernobyl -her Leg of Fission. Her left foot is being orbited by atoms - her Leg of Fusion.
- The Scorching, Troublesome Divine Flame (TH11)
- Searing Divine Flame (TH12.3)
- Subterranean Sun (TH12.5)
Utsuho Reiuji or Okuu is one of Satori's pets, a Hell Raven who has lived in the underground world since before it was separated from Hell. Her job is to regulate the flames of the Hell of Blazing Fires.
Before the events of Subterranean Animism, she was told by a voice (presumably Kanako's) that she could swallow the god, Yatagarasu, that was hidden in the flames to gain a power that would fulfill the wishes of both the worlds below and above the surface. This power was nuclear fusion. Utsuho misunderstood what the voice had told her, and decided that, using these powers, she would take over Gensokyo. Her friend, Orin, became worried about Utsuho, and drove evil spirits to the surface to cause an incident among the strong youkai above ground, in hope that they would come down to do something about it and, when they got there, defeat Utsuho and bring her back to her former self. What came, however, was not a strong youkai, but a strong human.