Trolls were once creatures of Earthsea, that would act vicious towards
humans. Becuase they no longer exist in the world of Earthsea, they are only mentioned throughout the series. In fact, it is said that the trolls were large creatures, probably not as large as dragons, with rock-like hands and gravelly, deep voices. It is unknown whether or not they were capable of speaking a language, whether it was the language of the Making or not. Many trolls were said to have been employed by dark wizards, guarding their lair or keep from unwanted visitors. They were also described as servants for their dark wizard employers.