Based on the transmissions intercepted from the Empire of the Rising Sun, this woman is known as Yuriko Omega, presumably a codename. Records of the exact origins of this Yuriko Omega are either highly classified or may not even exist. What has been gleaned, however, is that she must be the rumored survivor of an intensive program conducted by Shiro Sanitarium, a private paramilitary R&D firm seeking alternatives to Japan's increasing dependence on high technology in its military affairs. That program must have been dehumanizing to the say the least, yet the results seem self-evident: Yuriko appears to have powers that can best be described as monstrous. Her mind has been "sharpened" to such an edge that it can cut through entire squads seemingly at her whim. How exactly this power is manifest, or what effect such powers must have on this woman's psyche, is also unknown.
You can read the full article, along with a short video of this unit in action here, at RedAlert3.com.