RPK-16 is a social and mysterious Doll, and the fourth member of Task Force DEFY. She often introduces heavy philosophical topics in a conversation out of the blue before quickly making light of it. She is also fond of using strange and creepy metaphors or poems,[2][3] especially the metaphor of moths attracted to flames.[4][5][6][7][8][1] She nearly constantly puts up a mysterious smile,[9][10] but it's said it was never genuine.

Though she accepts the advantages of her technical immortality as a Doll,[12] RPK-16 yearns to abandon her Doll body for a human body, viewing mortality as philosophically perfect.[5][13][14][8] She wanted the ability to leave secrets unrevealed by dying.[11] She has no special reverence towards humans however, casually discussing their contradictions and flaws, and having no qualms about being cruel with them.[15][5][16][17]

This Edition of RPK-16 Predates The Investigation of Bremen & The Berlin Incident.