Hm, reading the rules it does indeed look like council members are goodie roles like Yvanoff says. But in that case there are quite a lot of people who can vouch for eachother as safe goodies.
@alxeu: Is council member a goodie roles?
Not necessarily. It was positioned in that area of the rules in order to convey that they were replacing the seer and priest for this game. They are more akin to traits than roles.