Diamond Dog (DD, the Most Important MGSV Buddy)
Diamond Dog is probably the cutest member of the Diamond Dogs as a whole and is found relatively early in the game, as well. The thing is, you can’t exactly use him yet seeing as how he is just a scraggly little puppy. But, if you give him some time, Diamond Dog grows into one of the best buddies in MGSV: TPP.
Once full grown, he can be taken out on Ops as your buddy. Since he has the ability to sniff out all living things in an area, he is perfect for stealth infiltration. This means soldiers will be marked even if you haven’t made a direct line of sight on them. Diamond Dog can also be used as a distraction in order to lure soldiers away from a point you just have to get to. Diamond Dog can also be really vicious with his ability to tear the throat out of an enemy.
But, please do be careful if you decide to take Diamond Dog as your buddy. If he dies, he’s gone for good, and nobody wants to deal with the vet bill. It’s outrageous.