Inspired by the cruel sights he witnessed during the Smoke War, he now creates numerous works as a member of the Ring. He primarily deals with insect themes, preferring to use insect carcasses and remnants of the old G Corp as materials for his creations. Nominally a Fauvist, his techniques are so specialized that he doesn't truly belong to any faction; he seems content to receive the bare minimum evaluation while leisurely focusing on his artistic production. Consequently, he remains a Student, though he believes he possesses talent reaching even that of a Maestro. He has long, messy brown hair tied back in a bun. He wears glasses, has stubble, and deep dark circles under his eyes, likely from being absorbed in his work. He is relatively short, around 167cm. He is approximately 36 years old. His right arm is a prosthetic; this is because he personally cut off his own arm—which had transformed into an insect limb due to body modifications received during his time as a G Corp employee—to use as material for a masterpiece. He wears a white apron over a black turtleneck and has a single ring on his finger. He is a heavy smoker. Outside of his creative work, he has an aloof and elusive personality. However, he harbors the obsession and madness characteristic of an artist, and occasionally makes remarks that send chills down one's spine. When creating, his habit of talking to himself is intense. He has immense confidence in his work and theories, believing that the world simply hasn't caught up yet and that he will eventually be promoted to Maestro and establish a new faction. Currently, he seeks someone who understands him, kidnapping people to show them his work; if they fail to praise it, he kills them. Incidentally, no ordinary person has ever liked his art so far. He becomes very attached and friendly toward anyone who praises his sensibilities. The reason Gregor hasn't been disposed of and remains a Student is apparently because a Docent of the Fauvists holds his work in high regard. He owns a small private atelier somewhere in the Backstreets, where he spends most of his time. Occasionally, he wanders the Backstreets to gather materials, hunting down insects and remnants of the old G Corp.