Ais an officeholder who represents the will of those who elected him or her and acts in constituents’ expressed interest.
delegate
trustee
politico
citizen

A delegate is an officeholder who represents the will of those who elected him or her and acts in constituents expressed interest.

Explanation:

An authorized person who represents a particular country in any recognized platform. The person is elected by a procedure. The specific person's responsibility is to carry on the specific activities and to manage the assigned task. The responsibility of the authority falls on the person where he decides and works accordingly.

responsibilities im assuming