*Topaz (トパーズ, Topāzu?) is a character that appears in the Sonic X anime series and its comic series published by Archie Comics. She is a human working as an agent for the Guardian Units of the Nations and the partner to Rouge the Bat. Although at first, the regimental Topaz disapproves of the scheming Rouge and deems her untrustworthy, the two eventually become friends. Their main assignments involved striking at Dr. Eggman and retrieving the Chaos Emeralds, as well as serving as envoys between Sonic the Hedgehog and his friends and the government.

Topaz is a human woman with peach-colored skin, a slim figure, violet eyes, and short sandy brown hair, often seen wearing blue earrings and pink lipstick. In regard to clothing, Topaz is notable for wearing different attire more often than most characters. Usually, it is a smart dark blue or green government uniform with black low-heeled shoes or dark blue combat suit.

She has also been seen wearing a purple shirt with a navy skirt; a more casual outfit consisting of a white sleeveless shirt, purple pants, a redwood belt with gold ornaments and redwood low-heeled shoes with gray soles; or even a light blue shirt, a black jacket and blue pants. While on vacation, she wears a blue and yellow striped bikini and a pair of red sunglasses with purple shades.

When wearing her combat suit, she is normally armed with a Heckler & Koch MP5 sub-machine gun (SMG), used by many U.S. Special Forces and police SWAT teams in real life, as G.U.N. serves as the main military forces for what appears to be the USA in the Sonic X anime.

Topaz is a loyal and determined soldier, though easily embarrassed and at times gives up too easily. Rouge often referred to her as an old woman, and Topaz later started striking her back by trying to expose her in public when she was casing a jewelry store to annoy her. She also finds Rouge's greed for jewelry to be tiresome.

Topaz appears to be trained in the use of military combat and various firearms. It also seems she is skilled at espionage and spying on others and is apparently physically fit judging by how she can jump fairly long distances with little effort.[36] She also appears to be trained to handle explosives, and can pilot cars and helicopters to a general extent.

While on Black Ops missions, Topaz can often be seen carrying either a submachine gun or automatic rifle with her.*