RPK-16 is a mysterious T-Doll whose smile was both serene and yet unhinged. She was a cheerful, poetic and talkative person whose tendency to wax philosophical was described as pretentious by Angelia or aggravating by AK-15. When other people lowered their guard around her, she would often say surprising things, leaving them startled. Despite her allegiance to DEFY, her whimsical nature and tendency to begin questioning Angelia's rash actions contributed to her decision to betray her team.