I will note that while I have not seen anything about gumiho having two pairs of ears, it can be a little thing that could be special to someone's interpretation. All I know as stated from lore is that Gumiho sometimes strive to be human, and to take on a completely human form. It's all up to the individual on what they want to do, but there's no "true fact: gumiho have two pairs of ears" in any of the lore I've read.
True, the mythos on these creatures is somewhat vague on what they are capable of and whatnot. @flametales loves to read up on this stuff and I like helping others who also want to learn and help character building by directing them to Luna-mun. But hey, it was great to see those posts you put up.












