A facilitator is someone who helps a group of people to work together more effectively. An enabler is a synonym for a facilitator, as they enable the group to achieve their goals. An AGENT is someone who acts on behalf of another person or organization, and in this context, it could refer to a facilitator who is acting on behalf of the group. An easer is someone who makes something easier, and in this context, it could refer to a facilitator who is making the process of working together easier for the group.