Subrosian
Subrosians are the native inhabitants of the lava world of Subrosia. Not much is known about them. They always wear cloaks so no one (other than themselves) knows what lurks underneath the robe.
Subrosians seem to be fond of heat, as their world is rather volcanic in nature, and some can be seen enjoying hot lava baths . They also appear to like dancing as evidenced from their Dance Hall. Since they are cut off of from the rest of the world they do not use Rupees as currency. Instead of Rupees they use Ore Chunks to pay for items. Visitors to the subterranian land will have to use them as well, but anyone equipped with a decent shovel can dig up enough ore in Subrosia to get by.
Subrosians also appear in Freshly Picked Tingles Rosy Rupeeland, where they run "Subrosian Saloons" all over the many islands. The saloons are where Tingle's various Bodyguards can be found to take with him into dungeons. One sidequest involves a Subrosian who has lost its robe, and is using a barrel as clothing instead until Tingle can find a new Robe.
An interesting tidbit about Subrosia, when you break it down it becomes Sub rosa or "underneath the rose" in latin. In acient times a rose over a doorway signified that a secret meeting was taking place. The name Subrosia literaly means "secret place" and Subrosian "secretive person".
Some have speculated the Subrosians may be somehow connected to the Garo Ninja due to similiar appearances.