The tag alias #74312 rook_(character) -> rook_(disambiguation) has been approved.

Reason: Ambiguous; has history of being used for multiple characters.

EDIT: The tag alias rook_(character) -> rook_(disambiguation) (forum #433086) has been approved by @spe.

Since it's somewhat related to the disambiguation itself, I've cleared out rook_(disambiguation) and rook_(character) but this one has left me a little stumped for now:

post #1272054

I've managed to figure out which character is Rook by identifying the other characters and their owners - the moose is morseapple_(character), the deer is vitus_(cutedeer) and the opossum is zendikar_(guropossum), leaving the dark-furred character on the left to be the unidentified Rook.

The post description links two dead Tumblr accounts:

Post-Apocalypse commission for MorseApple ft. scarvesarehot@tumblr, cutedeer , and corvus-arquitenens@tumblr!

We already know the two Fur Affinity users' characters, morseapple_(character) and vitus_(cutedeer), so we can infer that one of these Tumblr accounts is/was the owner of zendikar_(guropossum) and the other is the owner of Rook. I can take a good guess which one, since Corvus is the genus of birds that includes the rook, but I feel like this is too circumstantial to just rename the tag to rook_(corvus-arquitenens) without any actual evidence. The Wayback Machine does not seem to hold any meaningful archives of either Tumblr blog.

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EDIT:
Good thing I kept going, looking at existing tags on e621 I found rook_(greyrook), which looks very similar:

post #1237854

...and then I saw the source: https://rebotodlive.tumblr.com/post/161394226862/commission-for-scarvesaregood
That's evidence enough for me, rook_(greyrook) must be it.

Nice research. :D

The tag alias rook_(character) -> rook_(disambiguation) (forum #433086) has been approved by @spe.