Villager

A Villager (also called a Testificate from a temporary name tag in Beta 1.9pre1) is a passive NPC that spawns and moves about in NPC Villages. They spawn around the villages and inside the buildings. They spawn at their respective buildings corresponding to the role they have. They will spawn around any city or built up area. Merchants and quest starters are Villagers. You can find Villagers in Ragni, Detlas, Almuj, Selchar, Maltic, The Katoa Ranch, Nemract, Ternaves, Pigmen's Ravines, Elkurn, Bremminglar, Troms, Nesaak, Nivla Village and The Tower of Amnesia.

Trivia

 * Villagers are mostly passive, but Angry Villager, which spawns at the Corrupted Village, is the only hostile mob which has a skin of the Villager.
 * Currently, there is one Villager spawning inside the The Tower of Amnesia