Pretty immediately I recognized the cloak as that of org 13! I was really deep into KH a million years ago when I was a kid. What gave it away most, however, were the chains and the shape of the dangly pointy bits on them.
Perhaps you can alter the design of the robe more to suit the world your character is in? A small change could be adding a subtle dragon wing or skull in place of the pointy bit on the chains, and a bigger change could be perhaps changing the silhouette of the robe, such as slimmer sleeves or added layers.
If they are dealing with dragons directly, perhaps they might need heat protection?
If they are not directly dealing with dragons, and generally only interact with them as dieties, perhaps the dragons or fire are a popular/fitting decorative element?