KAY/O joined VALORANT's agent roster in 2021 as a robot soldier built to hunt Radiants, and his NULL/cmd ultimate quickly became iconic. Activating it overloads his chassis, sending out suppression pulses that disable enemy abilities while letting downed teammates revive him mid-fight. The voice line spread beyond the game into montages and meme edits, where it now sits alongside classic enemy spotted callouts as shorthand for a round about to swing hard.