I Won With This Design - Tumblr Posts
The next redesigned Sin is officially finished!
Ban

Ban's no longer a human—he's now a beast-man.
The idea was to pay homage to his sin and make him a different race that wasn't a human since Escanor's already a human, and I want to keep him that way. I thought a beast-man, based on a fox, would fit him perfectly for a few reasons:
Zhivago (it'd deepen their already cute father-son dynamic), it'd add lore reason to why Ban is in pursuit of a longer lifespan since beast-men canonically have a shorter lifespan than humans by a bit (outside of getting killed by humans), and foxes are usually considered 'devious thieves' and Ban fits the bill pretty well.
His eye-patch and arm isn't just for show—he actually lost his eye and limb in battle against the Red Demon when he first became immortal. The idea is that even if he can't die, he can still lose parts of himself like his legs, tail, arms, ear, etc., which would force him to be more careful I'd say. The wounds heal, but it can't regenerate. Plus, it'd play into his whole 'Sin of Greed' and how in the pursuit of greed, one can lose everything even if achieve what you wanted, in the end.