The Spread Shot of Utsuho Reiuji from the buried city. She attacks without meaning to simply by moving. That remains unchanged even though this Okuu barely remembers Yatagarasu's divine spirit. In fact, it's possible that she is less aware of her attacks. However, she knows when she is flying, so perhaps she's not as oblivious as she seems...

The Focus Shot of Utsuho Reiuji from the buried city. She gathers energy into a ball and fires it at the ground. This attack is very much intentional. Okuu may not have a particularly good memory for a youkai, but she appears to possess a good intuition and excel at performing calculations thanks to the way she uses her powerful ability in her work. If you consider the divine spirit inside her as some sort of acquired genius, then it follows that she must be a suitable vessel. However, she has been known to forget the faces of those she knows (or, rather, mistake them for contaminants).

A Spell Card of Utsuho Reiuji from the buried city. She attacks by scorching her surroundings with a summoned sun. Okuu is capable of drawing out and gathering the Underworld's energy. For this world's Okuu, that has changed into her being able to create fossil fuels. Of course, the real sun contains far more energy than fossil fuels release. But remember, over half of the world's energy is created by burning fossil fuels. This widespread and stable method of generating energy shines like a ray of hope in this world's Underworld.

A Spell Card of Utsuho Reiuji from the buried city. She attacks by turning herself into a burning sun. In order to release as much heat as the sun using fossil fuels, it's necessary for her to become a crucible, igniting ever fiercer reactions inside herself. As a Hell raven, her body can withstand the intense heat. She truly is a nova of the abyss.

The Last Word of Utsuho Reiuji from the buried city (a Touhou LW original). She attacks by launching the binary star that resides in the heart of the Underworld at her opponents. It's relatively well known that the center of the Earth is hollow and that it contains a star. But not many know that the "star" is actually a pair of stars. But think about it―a binary star being inside the Earth's core elegantly explains the existence of Earth's magnetic field and why the North and South poles periodically switch places, right? It's a tale of romance, like that of Hades and Persephone. Plus, it's estimated that the center of the Earth is roughly the same temperature as the surface of the sun.