Spirit of Fire is a powerful and legendary spirit in the anime series Shaman King. As Hao Asakura's primary spirit ally, Spirit of Fire is known for its immense destructive capabilities, especially its ability to manipulate and consume fire. It plays a crucial role as Hao's main weapon in battles, often overwhelming opponents with its sheer strength. The spirit's fearsome reputation and loyalty to Hao make it one of the most memorable antagonistic forces throughout the series.