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|Located||Pitch Dark Cave|
|First Appearance||Densetsu no Starfy 2|
|Latest Appearance||Densetsu no Starfy 2|
Riku (Japanese: リク, from りく [陸], literally meaning "land") is an enemy in Densetsu no Starfy 2. It appears in area 2 of Pitch Dark Cave in a section known as the "Indoor Cave" (Japanese: インドアどうくつ), according to its Picture Book description. It is the answer to a puzzle related to the land, the sea, and the sky. Starfy must defeat all of them to open the door to the next room. The wrong answers are Ku and Kai.