It's Ood Sigma, the Ood who turned his boss into an Ood, in what was the most horrifying ironic justice in recent Doctor Who memory. Since Ood Sigma had such an important role, he's wearing a different outfit than the drab grey of the other Ood, or the rags of the Natural Ood. This Ood is stylin'. I can't believe I just typed that.
Even though Ood Sigma is from the Series 4 figures, he has some decidedly older parts. The arms and legs are missing the swivel joints in the bicep and mid-thigh that most of the Series 4 figures have. That usually only happens when they're reusing parts from older figures. I would assume from the older Ood figures.