(Pr. skwil'eish), he is the demigod of leprechauns, trickery and illusions and the Patron of the Warlock James Quillus.
As part of the The Inner Circle of The Seelie Court, he is the court jester to Queen Titania and her consort Oberon.
As patrons often do, Squileish sometimes appears to James at specific moments throughout the story. Once, in episode 30, he took the form of an eight year old boy in order to communicate with his warlock charge.