What if instead of being the water hashira and former water hashira, Giyuu and Urokodaki were the flame hashira and former flame hashira respectively? If this were the case the fact that they all have fox masks and are “affectionately” called foxes would make more sense because kitsune’s or fox spirits are closely associated with fire instead of water. Although this in turn would have made Rengoku the water hashira, which would only make sense if you are thinking about a bright orange and gold koi-fish (i mean yeah he has the attention-span of one but-). But in-conjunction to this that would mean that Tanjiro would know flame-breathing and sun-breathing, although he probably would be constantly getting the two confused. And it would make a bit more sense with Nezuko since her blood demon art basically makes her a walking stick of dynamite.
(Also Sabito could have the nickname “Fire-Fox” and it would be funny)
