Guy Crimson (ギィ・クリムゾン, Gī Kurimuzon), also known as Rouge (原初の赤ルージュ, Rūju) is the anti-villain/anti-hero and the supporting protagonist of That Time I Got Reincarnated as a Slime. Guy is the Red Progenitor, the first and perhaps the most powerful Demon Lord who rules over the demon-infested wastelands of the northern icy continent. He is known as the first of the Primordials and the first seat of the Octagram. He resides in the Ice Continent.