Dr. Unne is a minor character from the original Final Fantasy. He lives in Melmond, and can teach the Warriors of Light Lufenian if they bring him the Rosetta Stone. His brother, who lives in Onrac, tells the player that Unne has been searching for the Rosetta Stone, and there are hints that the wise doctor has been studying the Lufenian language for some time.
When the player reaches a certain level in the Lifespring Grotto in Dawn of Souls, they will encounter a library filled with enthusiastic scholars; a few of them mention that Unne studied there before setting off in search for the Stone. It would seem the artifact was the last step for him to learn the language. The Rosetta Stone can be found in the sunken shrine in the upper levels.
Learning Lufenian is one of the most important parts in the game because it grants access to the town of Lufenia. Lufenia has the most powerful magic spells in the game, and by talking to an NPC, players can obtain the Chime that allow entrance to the Mirage Tower and the Flying Fortress.
Dr. Unne appears twice in 8-Bit Theater. First, he appears after Black Mage asks "How many bowels does this godforsaken planet have?!", announcing the answer is in his book "Dr. Unne at the ass end of the world and other adventures" while being credited as a "geoproctologist". In the other, the Real Light Warriors give Unne the Leifenish-translating cypherstones―then Black Mage sets Melmond on fire. It is unknown if Unne survived.