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.[11]

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]

RPK-16's specifications are the lowest among Task Force DEFY,[18] and she is built for support fire rather than frontline combat.[19]

RPK-16 has been known under other identities:

• She started as an evolution of the AI Nadia and was called by this name in a few instances.

• Her true name is Pandora, with RPK-16 as an official designation. Some Paradeus members called her by her true name.

• After taking over Angelia's body and becoming a Relic key, she took the name Embla.

RPK-16 emphasized the importance of trust between herself and AK-15, and between AK-12 and AN-94,[20] but she often engaged in passive-aggressive confrontations with AK-12, in reaction to her haughty attitude.[12] RPK's retorts carried the implication that she thought of 12 and herself as equals.[12][21] 12 claims she doesn't hate RPK, but that RPK's quirky persona, while perceived as friendly by some, makes others instinctively distrustful of her.[22] 12 called RPK the caretaker of “the female gorilla”, which was her nickname for AK-15.[23] RPK was much more agreeable towards AN-94's meeker demeanor,[12][20] though she also discounted her as 12's shadow.[24]

Despite her initial reserves about RPK due to her lower spec by DEFY's standards, AK-15 came to put her trust into RPK for enabling her to make the most of her abilities[18] and being able to approach objectives efficiently in ways she couldn't.[25] RPK frequently asked 15 about her point of view,[26] encouraged her to think beyond her usual approach to combat [27] and to speak her thoughts with her.[28] After RPK's betrayal, 15 made special preparations to go against her. 15 considered that she was the best adversary for RPK, as RPK knew more than anyone that she would stand no chance against 15, and planned to make RPK her last target.[18] 15 was enraged when 12 ended up killing RPK in her place. [11][29]

RPK felt that because of her position as the youngest and weakest unit within DEFY, the other members of DEFY looked down on her and more easily trusted her because she was not a threat to them. [24]

Gray is the only person to consistently call her by her true name, “Pandora”,[24][30] and was her sponsor within Paradeus.[31] Nemhran also considered her a valuable asset.[32]

-Updated the bot