a person who speaks in favour of a person or idea

person supporting an idea or cause publicly

a person or business that represents, or that manages or arranges the affairs of, another or others

person representing an organization or person in business

a member of a council

person who acts in the stead of another

an adviser, especially on personal matters

jurisprudent

a person who makes arrangements for two people who do not meet at first

person acting as an agent

a person who inquires

questioner

an expert in law

jurisprudent

a person who practises law, especially an attorney or solicitor

person who is trained to counsel or argue in cases of law

a person (or legal representative) who prosecutes

person who checks thoroughly

(a document giving) authority to represent or act for another (especially in voting at an election)

agent