Hades

Hades, real name Purehito, was Fairy Tail's 2nd Guild Master, before passing the title to Makarov, going off in a journey. Now, he is the leader of the Grimoire Heart Dark Guild, whose goal which is to unseal Zeref.

Oración Seis arc
The first time he is shown on the airship, which is probably the base of operations Grimoire Heart Guild. He talks with his guild members about Oracion Seis' activity. He doesn't plan to join them, but he supports them. One member of the guild says that they should focus on finding the keys to the Zeref's seal.

S-Class Trial arc
Hades appeared with Ultear and some other members of Grimoire Heart inside of their airship, on the zeppelin base of the dark guild. He is reported by Ultear, that they at last found "him". He immediately orders his subordinates to set the course to "Fairy Island". As of Chapter 213, three mages of his guild have appeared on the island, one of them being the Seven Kin of Purgatory member, Azuma. When the guild approaches Tenrou Island in search of Zeref, they are confronted by Makarov in Full Body Titan Form. While the his subordinates are all in shock and intimidated, Hades laughingly says Makarov's name despite the colossal being before him.

Magic and Abilities
Given his status as the leader of Grimoire Heart, it can be assumed that Hades is a dark wizard with enormous magical powers, similar to other dark guild leaders. Another testament to his power is that he has powerful subordinates such as Ultear and Azuma. While all of his subordinates were taken aback by Makarov's fearsome titan magic, Hades was not intimidated at all.

Grimore Law: An exact copy, but in an evil version, of Fairy Law. If used against Fairy Law, it would cause horrible devestation.

Trivia

 * His name refers to, the Greek Mythology as Hades, the God of the Underworld
 * He bears a striking resemblance to the Oración Seis member Haja from Rave Master
 * For some reason, footage of his right eye hasn't been revealed. Whether this is intended or not is unknown.
 * When he first appeared in Chapter 131, he had a thin, black moustache like Master Jose's. But now, he has a moustache and beard similiar to Faust's.