Megaladons

The Megaladons are a pirate mercenary faction operating from the Ioan moon, Diamond. They are known for their ruthless tactics and providing their crew with mutagens to give them shark-like features.
Sigmund Albrecth drove the Megaladons out of Adamant City for breaking laws, but the group returned when news spread that Sigmund suffered from a fatal illness. Liam Albrecht hired the Megaladons in his plot to kill his brother Simon and kidnap his uncle, Cecil. Simon visited the Megaladon's guild hall to call them off, but the leader of the guild refused to back off and taunted Simon. In a rare display of force, Simon shot the leader in the head, and managed to convince the second in command to call the Megaladons off.