In short in DoS2 you can play as one of the companions available to you in the game. You have his/her background and you have a different subplot related to your past that you usually cannot see in full if you have it as a companion. The other ones (and random mercenaries you can hire) are available to recruit to your party. You can talk, hire, have a companion quest, romance... the other companions. Only when you start the game you can shape the story of one of them or make a new character.
It is like the Dao Origin stories, a background subplot you only have if you choose to be this character; only that in the next game this character can be your companion. You can choose your class and attributes but you have a fixed past, race, sex, voice and name. You can choose betwen 6 different origins or create a brand new one from scratch.
In DoS2 for example, if you play as Sebille the god that "helps" you is of the Elven Pantheon, and you can seek revenge on your kidnappers and fulfill (or not) the destiny someone took from you. If you start as Ifan you are a human assassin hired to kill the son of a god while you try to make peace with your past. The human god is the one that gives you powers.
The main plot is almost the same for all of them and your custom character.
Think of it as if you can play as Imoen at the start of the Baldur´s gate game in candlekeep, play as Sarevok , etc... or create a new baalspawn, son of Gorion and raised in Candlekeep.
Last edited by _Vic_; 15/07/19 06:41 AM.