Freed Justine is a 20-years old mage who is skilled enough to be a S-Class Mage(stated by Erza). Freed is a member of the Fairy Tail Guild who doesn't show his face often. Laxus Dreyar calls him Freed the Dark.
He hasn't been to the guild for half a year, and hasn't met any of the newer members like Lucy Heartfilia. During Fairy Tail's battle with Phantom Lord Guild, he was off in another town. He is a member, and also the captain, of the Raijinshuu, a group of mages who act as servants to Laxus, with Freed as the self-proclaimed captain. He is known as one of the "Mystery Men" along with Mystogan and Gildarts. His magic style is Enchantments.
Freed seems to be the most quiet of the Raijinshuu. He also seems to care for his former friends as he questioned Laxus when Laxus told him to kill other Fairy Tail members if he must. He seems to respect Laxus as he does whatever Laxus says even killing other guild members if he is ordered. When Mirajane shouts at him saying weren't they friends, Freed closes his eyes and replied "we were once." After Laxus left Fairy Tail, he shaved his head, it grew back to normal as seen in chapter 165.
Freed's magic allows him to write runes that, depending on what is written, will actually effect its target, though Freed's magic seems to do more with inflicting pain and suffering on his opponents. It was first used during the Battle of Fairy Tail, where Freed's enchantments were used as traps do have the guild members fight each other to escape. Contrary to Makarov's theory that his magic needed some time to complete, Freed was shown to be able to easily write characters with his sword to produce its effects.
(Source: Wikipedia)