The line comes from Kingdom Hearts II, the 2005 action role-playing game in which Xigbar serves as a member of Organization XIII, a group of antagonists working against the heroes. Fans later lifted the short exchange into soundboards and video edits, where its blunt accusation worked far beyond its original scene. Because betrayal is a constant theme in games, streams and online drama, the clip remains a handy shorthand for calling out a double-cross without needing any extra explanation.