Raiko Horikawa is a drumming tsukumogami from the Touhou Project series, known as the spirit of a taiko drum that gained life after many years. She appears as a lively, energetic character who loves music, rhythm, and performance. In the series, she serves as a stage 1 boss in Double Dealing Character and is associated with the themes of sound, rebellion, and celebration. Raiko often represents the power of music and the idea that ordinary objects can awaken into extraordinary beings.