I don't think that I ever put the refs of the things here but here we go.
Art is from 2016-2017 and some details may have changed but nothing too critical so it's good enough for now, creatures themselves are very much recognizable.

seen from Canada
seen from United Kingdom
seen from China

seen from Netherlands

seen from United States
seen from China
seen from China
seen from Brazil

seen from United States
seen from Germany

seen from United States
seen from Yemen

seen from Greece

seen from United Kingdom
seen from Italy
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seen from China
seen from China
seen from China

seen from Yemen
I don't think that I ever put the refs of the things here but here we go.
Art is from 2016-2017 and some details may have changed but nothing too critical so it's good enough for now, creatures themselves are very much recognizable.
Gluttony but a gryphon. Otherwise okay disguise but she gets lots of questions about her heritage which doesn't downright look any of the existing gryphons.
As per usual procedure, here are all the guys [gender neutral] in same post.
Due to the actual main reference sheet being traditional art, it has apparently confused people all these years so I finally yielded and made simpleish plain flat color versions for clarity. These are supposed to go with actual ref sheet so focus is on flat colors (and material placements).
I want to say that I absolutely don't require any exact hues, like, just do something along the guidelines. I make only traditional art and there's no hex codes or flat coloring comparable to digital flat, I don't require that. But hopefully this helps to figure out how to color a sin, since ref sheet images are heavily shaded and textured.
And here are all the guys [gender neutral].
Pride - Envy - Wrath - Greed - Sloth - Gluttony - Lust
All my sin named creatures with monochromatic coloring and in weird funny poses - the collection.
It was kinda therapeutic just stretch their anatomy a bit and draw technically cool creatures in unflattering poses.
Gluttony has beer in proper Oktoberfest way.
Traditional painting portrait series of my sin named creatures from 2021. Took a long while to make but glad I did.
From top-left to bottom-right: Pride, Envy, Wrath, Greed, Sloth, Gluttony, Lust.