Rocks (石 ishi) are a simple material that the Earth's outer solid layer is made out of. There are clear views of various materials made of rock that are shown throughout the Touhou Project, but they are very rarely referenced. Keystones are made of rocks.
The Rock's Appearances
- Subterranean Animism
Brown-coloured rocks strangely appeared as a general enemy on stage 1 of Subterranean Animism. They'll come falling down rather slowly as the player travels through the Fantastic Blowhole towards the Underworld, where touching them will lose a life. They'll come in different sizes and are trivial to deal with, but if larger rocks were to be destroyed, then they'll break into smaller rocks. They don't shot danmaku, but if playing on lunatic, destroying larger rocks will also cause an explosion of yellow danmaku.
- Koishi Komeiji is often compared to a little rock sitting on the side of the road in official texts, being based on her ability, indicating her lack of presence. Her name can also mean "little rock" (小石 ko ishi).
- Wikipedia entry for Rock