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.
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