Those who read this RWBY Theory know that earlier that I mentioned about Zwei being Toto, and due to the request I have decided to make this theory all about Zwei, first off I wan't to mention that Zwei is the German word for two, and his inspiration for design came from another Corgi from a different Anime, called Cowboy Bebop, the Character Ein is a Corgi, Ein is the German word for one, later on I'm sure there will be other anime's that will have a corgi named after the next German number, Now that is out of the way on to the main theory, Zwei, who is Zwei, when I looked up Zwei RWBY on the internet I came across some amazing and some funny pictures, but I stumbled upon a theory stating that Summer saved Zwei from the pound, and that he continues to show his gratitude by looking after Ruby, after all dogs know when someone is sad, I tend to think that Zwei is not just Toto but also maybe another allusion like Ruby, he might also be the Big Bad Wolf, who actually turned good, and ends up helping little red, possibly Zwei had some kind of dark past, and Summer liberated him in some way, making him better and loving, I tend to think that Zwei is an animal that has actually unlocked his aura, the reason why I say this is because we have seen Zwei fall out of a tube, filled with dog food, at first he was cylindrical but then returned to his normal shape, then we see Zwei being launched by Dr Oobleck's thermos flamethrower, at that we then see Zwei covered in flames flying to White Fang members, he's literally a hot dog in that part, but what is interesting is the next part we see Zwei, we see him control an Atlas prototype, what makes me confused is how does Zwei do all this? is he invincible? is he even an actual dog? does he have some kind of rare disorder where he has thumbs? Here's what I think, Zwei is most likely invincible, that could be due to his possible semblance or his aura, that would explain why he was inside a tube filled with cans of dog food and sent through the mail, it's either he's invincible or the worst kind of semblance ever, one even worse than Qrow's... Immortality, unable to die, forced to watch your loved ones to suffer and die right before your very eyes, unable for you to join them, sorry if that got dark a bit, any way, thank you, this was interesting to write but hey please leave a comment and vote please, thank you.