I had to put thought into this, because I came to realize that this is a very delicate answer. When I think of my favorite animal in gaming, I think about the animal I want at my side, in a fight. I could've gone with Red XIII (Final Fantasy VII) who is one of the few animals in FF who is a playable character, but then I thought of Haomaru (Persona 5) who is based on a real life awesome dog, uses a ninja dagger as a weapon AND has his own persona!
My vote, however, lies in the past. Have you played Samurai Showdown? If you did, then you know Galford, an American ninja who has a dog companion, Poppy.
Who needs weapons or fireballs when you can send your dog to suplex your opponent?
