Tenmu Suitokuin is the 4th stage boss and the main antagonist of the Touhou Project fanmade game, Mystical Power Plant; a Great Tengu who was a former human that resided in the Outside World, where she was once known as one of the Great Three Vengeful Spirits. She tricked Mitama into causing the Life-Guiding Tree incident in an attempt to overthrow the Moriyas and have them expelled from the Mountain.
- Tenmu Suitokuin is based on Emperor Sutoku, the 75th emperor of Japan. After his abdication and death, Sutoku is said to have become a vengeful spirit (in some accounts, a great tengu). Along with Sugawara no Michizane and Taira no Masakado, Emperor Sutoku is known as one of the three great vengeful spirits of Japan.
- Her last name, "Suitokuin" (祟徳院), is nearly identical to "Sutokuin" (崇徳院), the name taken by Emperor Sutoku after abdicating. "Sutoku" means "esteemed virtue", while "Suitoku" means "vengeful virtue". The character "In" (院) has several meanings, one of which is a suffix added to emperors' names after the end of their reign. "Sutokuin", then, essentially means "the ex-emperor Sutoku".