For boss information, see Atropos XR (Monsters).
Atropos XR was a creation of the Mother Brain AI and lived as Robo's companion. She looked like Robo, except pink and slightly shorter. Atropos XR survived the fall of Lavos; the corrupted Mother Brain brainwashed her into helping to create a nation of steel. During the Origin of Machines Sidequest, Atropos XR and the Mother Brain tried to convince Robo of his previous quest to study and eliminate humanity. Robo resisted, and she accused him of being the victim of human tampering. She then warned that a short time ago she was outfitted by Mother Brain to eliminate humans more efficiently. Robo then defeated Atropos XR in single combat, and she regained her memories. She gave Robo her Ribbon; it would boost Robo's Speed and Magical Defense if plugged into his circuits.
The ending of Chrono Trigger shows Robo sitting on a cliff with Atropos in front of a rainbow. Beyond this ending, it is never truly revealed whether Atropos and Robo share a romantic relationship. The dialogue following their battle suggests that they did indeed know each other well before the Day of Lavos scattered them across the ruined landscape, and her gesture of giving the Ribbon to Robo suggests that their bond was more than friendship.
Greek and Roman
In Greek mythology, Atropos was one of the three Moirae, also known as the Fates. The Fates were female deities who, rather than determine fate, supervised it. Atropos was the Fate who cut the thread of life. She was known as the "Inflexible" or the "Inevitable" Fate, and ended many a mortal's life with her infamous "abhorred shears", all at her own whim. Her "co-Fates" were Clotho the Spinner, who spun the thread of life, and Lachesis the Apportioner, who measured the length of each thread. It is unclear whether the Fates had parents or not, but some think they were the daughters of Zeus, the ruler of the Greek pantheon, and Themis, the goddess of order. However, this is highly debatable. It is not clear whether or not Zeus was subject to the Fates as all mortals were, or if he was totally immune to their power. The Romans called the Fates the Parcae, or Tria Fata (made up of the goddesses Nona, Decuma, and Morta).