Namazu

The Namazu, also known as the Unnamed Giant Catfish, is the villainous avatar of the Taisui Xingjun, the Chinese god of disasters, who sent assassins disguised as familiar characters to attack Hong Meiling during her dream that she got from seeing Hisou Tensoku in the distance and believing it to be the Taisui Xingjun. The Namazu's purpose was to feed on enough of Meiling's energy to awaken by having his minions do so. He also spoke strongly of his plans to invade and cause disasters and earthquakes in Gensokyo.