Scarlet Banshee

Scarlet Banshee (スカーレットバンシー Sukāretto Banshī) is a Dark Guild who acts in the port town of Hargeon. After the City of Eden became the major point of port in Fiore, Hargeon was sieged by the Scarlet Banshee, in the time a runaway guild who was heavily attacked by the Magic Council. They seized control over Hargeon and now are the de facto rulers of the town

History
The Scarlet Banshee was founded around a decade ago by the banshee Andraea to assecure her own survival. The Guild grew around her and the members treat her with high respect. When their grown in numbers challenged the supreme authority of the Forsaken Star over the dark guilds, they managed to have the First Regiment finding, hunting and destroying their guild, forcing the Banshees to flee

After a year of running, they found Hargeon. With the town's economical collapse, caused mainly because of Eden's new position inside the country, they had no problems in invading them. They seized control over the town and successfully took the town as their new home, tormenting the townsfolk and taking the cargos. This caused many problems to the country. By the start of the year of X889, the Fairy Tail received a job to obliterate the guild. Sophia wanted to send a big team for this, but instead, was convinced to send a team of only four members

Trivia

 * The reason for their name is that their Guild Master, Andraea, is a banshee
 * They are the main antagonists of the first Story Arc of Fires of Heaven