Feste (or "The Feste") is an unknown group/organization that was said to have granted the Welter their jurisdiction over Mermaid Island.
Overview 
Edit
Not much is known about the Feste other than that they were stated to have granted the Welter their jurisdiction over Mermaid Island as well as supply them with a factory for manufacturing supplies. Albeit, according to Charlotte Scherzen, the Feste is apparently unpleased with the way the Welter is running things.
