Also known as: 聖杯くん
Carnival Phantasm's depiction of the corrupted Great Grail. It appears as a purple creature with a constant :D expression, an orb over its head, and its tongue and body pouring fluid. It speaks in a high-pitched, condescending voice, and its solution for various characters' problems is to offer a butcher Knife and suggest using violence. It has since appeared in Fate/Grand Order's Han'Ei No Chocolate Gardens Of Valentine event and Fujimaru Ritsuka Wa Wakaranai.