The EE-One-D is the surveillance drone gadget used by Lion, an attacking operator in Tom Clancy’s Rainbow Six Siege. Lion and his gadget arrived with Operation Chimera in 2018. During a scan, moving defenders can have their positions detected, making the associated audio an immediate warning to remain still. The cue became familiar through regular matches, gameplay videos, streams, and tactical edits. It remains useful because players quickly connect its electronic scan pattern with surveillance, exposure, and the risk of being located.