VX900 is a was originally built as a recon drone before the catastrophe. At some point in the intervening centuries VX900 has been repurposed into a Medical robot. It retains the light, agile build of its original purpose but has been retro fitted with Med Gel synthesizers. The  ancient camouflage paint scheme and active cloaking screens have been stripped off and VX900 bears a red paint job with a white caduceus painted on both the back and front of its torso and on the outside of all 4 limbs.