Riko Ikazuchi operates as a narcotics enforcement agent targeting a drug trafficking syndicate. Her deep undercover mission requires posing as part of a newlywed couple with her junior colleague, infiltrating the syndicate’s apartment complex hideout. Maintaining their cover becomes critical when criminals suspect their lack of audible nighttime intimacy. To preserve their facade and avoid exposure, she initiates physical intimacy with her partner despite initial reluctance.

She exhibits resourcefulness and resolve throughout perilous operations, including stakeouts, infiltrating a syndicate-linked nightclub, and enduring capture. During imprisonment, she is forcibly administered a drug that weakens her body and amplifies arousal. After escaping, she blames the lingering aphrodisiac effects for a subsequent intimate encounter with her partner, though unacknowledged emotions may influence her actions.

Mission demands push her into increasingly compromising situations to gather intelligence or evade danger. She orchestrates a public display at the nightclub to reinforce their cover and seduces a lookout while caged alongside her partner. These high-stakes experiences erode boundaries between professional duty and personal desire. Initially dismissing physical reactions as operational necessity or drug influence, she gradually confronts genuine romantic feelings for her partner, undermining her professional detachment. This conflict between duty and emotion intensifies near the mission’s end, surfacing suppressed feelings.

Physically, she has brown hair and brown eyes. She employs firearms such as the Smith & Wesson Model 36 during confrontations with the syndicate.