Smith emerges in the character's bond story as a victim of the "Killer Nikke" investigation, discovered in a frigid, bleak alleyway while making erratic movements. Physical distress marks Smith's appearance, with blood visible on fingers and mouth. Upon encountering the protagonist, Smith turns hostile, swiftly blocking their escape route and posing an immediate threat. Maiden intervenes by deploying her kotodama ability, first uttering "[stop]" to immobilize both Smith and the protagonist, then commanding "[sleep]" to render Smith unconscious. This incapacitation halts the danger, enabling Maiden to resolve the threat. Afterward, Maiden sternly cautions the protagonist against disclosing her involvement, stressing Extrinsic's operational secrecy. Smith's condition and background receive no further elaboration, and the character does not reappear in other documented media.