I think I posted those Metal Gear Solid V Tokyo Game Show videos too soon. Not because the first set of videos were in Japanese - this one is too - but because the video released at the end of this weekend has introduces a new companion for
Solid Snake Big Boss: a wolf. A wolf with an eyepatch.
The new companion is called DD, after Diamond Dogs, the name of Snake's crew. As the video above shows, you find the pup in the jungle with its sadly departed mother, and can then use the same capture technique you use to turn guards and vehicles to your side. Eg, you tie a parachute to a baby animal and launch it into the sky, where a waiting plane scoops it up. (This is a thing which actually exists in some form, by the way).
Best of all, the pup has an eyepatch just like you.
Metal Gear Solid V: The Phantom Pain is due for release next year, and has been confirmed to be coming to PC. We're also due to get the prequel chapter, Ground Zeroes, although there's no word as to when.