Yuuma Toutetsu in Touhou Gouyoku Ibun
More Character Titles
Chairwoman of the Gouyoku Alliance
|"Seriously? This is what petroleum is?" "Yep, absolutely. In the Outside World, they even use tons of the stuff while knowing full well what it is! Petroleum has always been produced from organic beings. This liquid has always been made from the fear, pleasure, grief, loathing, and resentment of living creatures! Now get out of here, you pair of eternal poors!" — Joon Yorigami and Yuuma Toutetsu (Touhou Gouyoku Ibun Joon and Shion's Scenario)
Yuuma Toutetsu (饕餮 尤魔 Toutetsu Yuuma) is the leader of the Gouyoku Alliance under which the eagle spirits serve. She is briefly mentioned by Saki Kurokoma in the Extra stage of Wily Beast and Weakest Creature before making a proper appearance as the main antagonist and final boss of Touhou Gouyoku Ibun.
She is clever, calculating, and avoids pointless conflict by nature. However, it seems she doesn't think twice before attacking someone if she thinks her business is in danger, as she attacks multiple heroines in Touhou Gouyoku Ibun thinking they were there to steal her oil. She exhausts all the other organizations within the Animal Realm because they feel her methods to be dishonest and cowardly, but her underlings adore that sort of thing from their "way-too-reliable boss with nearly-invincible power." And as per her ability, the things she eats can influence her personality, so it may vary from time to time. 
- Capable of absorbing anything
She's able to swallow whole and devour absolutely anything, whether its body is physical, spiritual, organic or inorganic. On top of that, by swallowing something, she's able to comprehend it and turn it into her own power. The things she eats are also said to influence her personality. 
Yuuma is a taotie, a creature in Chinese mythology known for their extreme gluttony. Taotie are also referred to as one of the "Four Evil Creatures of the World" in Chinese mythology, and the taotie in particular may serve as a reference to the mythological figure Chi You, one of the three legendary founding fathers of China. In China today, Chi You is worshipped as the god of war.
Her full name is Yuuma Toutetsu (饕餮 尤魔).
Her given name, Yuuma (尤魔), is written with characters meaning "outstanding" and "devil". The character yuu (尤) is likely derived from Chiyou (蚩尤 Shiyuu), an ancient Chinese tribal leader theorized to be the basis of Taotie symbolism.
Her surname, Toutetsu (饕餮), is the Japanese name of a Chinese creature called the Taotie. This follows the pattern established by Yachie Kicchou and Saki Kurokoma, who are also named after the creatures they are based on.
Yuuma has white hair and red sheep horns with blue ribbons tied around them. She has red eyes with horizontal pupils and pointy ears decorated with silver earrings. Her teeth appear to be notably sharp.
She wears a teal dress with red half-attached arm sleeves. The skirt is decorated with a meander pattern, alongside a couple of eye patterns. She carries around a large spork.
The final boss of the game. Most of the other characters were unable to beat her, either due to Yuuma absorbing their attacks or being talked out of actually dealing with her, but Okina manipulated Flandre Scarlet into fighting her and she used her ability to destroy anything to beat her, as Flandre's ability couldn't be absorbed nor could Yuuma talk her out of fighting her due to Flandre's childish nature. As a result, Flandre is the only character who can progress to Yuuma's final phase.
Given they are leaders of opposing factions in the Animal Realm, they are antagonistic of each other. However, considering that both of their factions teamed up during the events of Wily Beast and Weakest Creature, their relationship might not be as terrible as it seemed.
Similarly to Yachie, Yuuma and Saki are the leaders of opposing factions in the Animal Realm, so they are enemies.
Cover of Gouyoku Ibun featuring Yuuma
- Yuuma is unique among Touhou characters in that she was mentioned by name before the game she physically debuted in: "Toutetsu" was briefly mentioned during the Extra scenario of Wily Beast and Weakest Creature.
- Touhou Gouyoku Ibun - Yuuma's Profile