Dr. Orpheus, or Orph, is Ross and Holly's pet cat. His hitherto only appearance is in the NEW Game Grumps and Steam Train Shirts!! video, where Ross holds him in a manner few cats would enjoy. (He is then instantly replaced by a pan that Ross is using to cook.)
In the outtakes video many shots of Ross holding him are shown. Despite mostly meeting Ross's grip with patience atypical for a cat, he loses his patience in the last shot and frees himself with cat-like aggression.