The thing that ties the characters in DoS2 game is that
all the origin characters are sorcerers, so they have to be chained using a collar, all of them are captured and chased by the Magisters because of it and all of them are the chosen of a particular god or devil, and the gods offer to them the possibility of becoming the new divine.
The source collar is accessory, you can get rid of it after half-hour in the first chapter.
