His primary role is to deliver God's messages and announcements to humanity.
A powerful divine messenger, a figure of great authority and divine will, a compassionate and caring being who loves humanity, and a being of intense power that can be both terrifying and comforting.
He brings divine strength, teaches important truths, and guides people toward holiness and understanding. 
Serious and authoritative, also compassionate, patient, and capable of humor and warmth.