Q was an inventor from Novigrad in the mid-13th century. Due to his name being unpronounceable, he was referred to by his initial. He sold multiple gadgets, such as a poisoned goose feather, an ink-grenade, or a sword hidden inside a lute. Q worked independently in the city, although he occasionally also cooperated with Chappelle, a fact he would reveal only to people in good standing with Chappelle.

Trivia

His being a scientist who makes gadgets and is called Q is a reference to the Q character in James Bond.