Dr. Borville

Borville is the only Doctor in Hyrule Castle Town. He refused to treat Prince Ralis, but treated Ilia. He owes Telma a lot of rupees. It is said he charges large amounts of Rupees for his services and doesn't like treating other races (as shown when he didn't properly treat Prince Ralis), and doesn't want to talk to people unless they have a large amount of Rupees with them. He also helps in bringing Ilia's memory back; by giving him the Invoice he will tell you the location of the wooden statue. Also in his house/hospital you will find the Medicine Scent, which is crucial to getting Ilia's memory back.

Trivia

 * The old scientist inside the Lakeside Laboratory in Ocarina of Time and the Marine Research Laboratory in Majora's Mask resembles Borville, possibly a descendant. However, Borville seems to hate Zoras, unlike the scientist, who helped and lived near Zoras in both of the aforementioned games.