Mystogan

Mist Gun (ミスト・ガン Misuto Gan) is one of the S-Class mages of the Fairy Tail guild.

Abilities
Not much is known about what his magic revolves around, though as a S-Class mage, he is one of the stronger mages of the guild he seemingly used a sleeping spell to knock out all of the Fairy Tail members (save for Makarov) once when he was going to take a mission from the guild.

History
Mist Gun is a reclusive member of the guild, and as a result, his past is a mystery. His first apperance was at the beginning of the Garuna Island arc, where he put all of the guild members to sleep, before he took a mission and left, leaving the guild quite mysteriously.

Later, during the fight against the Phantom Lord guild, Mist Gun is shown to have gathered Makarov's lost magic together, giving the guild master strength to go to the battle site and defeat Jose Pola. When Polyushko questions why he doesn't help the guild in their battle, he reveals a ton of Phantom Lord flags, which shows that Mist Gun had single-handedly destroyed Phantom Lord's sub-divisions.

His latest apperance occurrs during the massive battle Luxus Dreher had staged between Fairy Tail members, where he calmly walks into the town, making the number of Fairy Tail members capable of fighting a total of four; himself, Natsu Dragonil, Erza Scarlet and Gazille Reitfox.