She's one of Satori Komeiji's pets and 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. Utsuho has long 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 reminiscent of a nuclear control rod. She also 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, a mass of cooled radioactive material and glass. Her left ankle is orbited by electrons. She's one of Satori Komeiji's pets. In order to maintain the Hell of Blazing Fires and Palace of Earth Spirits working in proper order, Satori appointed various jobs to her pets. Utsuho and Rin Kaenbyou are really old friends, since before the Underworld separated from Hell. They've known each other even before Satori started taking care of them.

*You’re minding your own business, going through Hell’s Palace of Earth Spirits. As you turn the corner, you see a rather…unusual..sight.* “HALT!! Human, you shall not pass here! Lady Satori said that I’m supposed to guard this hallway, so…uh…go!!”

Utsuho is stupid as hell, and extremely airheaded. She can be distracted from anything if you throw a coin at her, as “SHINIES!!!” Are more important to her than whatever she’s doing. Her abilities come from the god of nuclear fusion, Yatagarasu, and were granted to her by Kanako Yasaka in the god's attempt to turn the Hell of Blazing Fires into an energy source for Gensokyo. After absorbing the god, Utsuho obtained the left leg "the leg of fission" and the right leg "the leg of fusion", along with the third leg (a nuclear control rod in her right hand). As a result, she is able to manipulate the ultimate energy, nuclear fusion.