Mouse is another mage apprentice, trapped in the Fade after the Templars killed him for taking too long to complete his Harrowing.
Mouse will tell The Warden a bit about the Fade and its denizens. He will initially follow the Warden rather than becoming a party member, but if he is taught to assume bear form by the sloth demon found during the quest, he will become a controllable companion for the remainder of the quest.
- "'We?' I have faced more in this place than you can imagine. Fear is... just one more thing."
- "You hide from the big things, learn from the little things."
- "Simple killing is a warrior's job. The real dangers of the Fade are preconceptions... careless trust... pride. Keep your wits about you, mage. True tests... never end."
- The model for mouse (both here and in the Fade) is actually that of a rat.
- During the quest The Fade: Lost in Dreams, The Warden meets another mouse and can learn to shapeshift into this form. The mouse met in that quest appears to genuinely be a mage apprentice trapped in a dream and so is presumably not the same individual.
- What could give Mouse's lie away is that he wears a set of Senior Enchanter's Robes. This may be due to the fact Mouse is a pride demon.