Video from Off the Kirb Ministries
"Angels or how is an Angel described in the Bible? There is an unseen spiritual world and Angels are all around us - including Guardian Angels." from video introduction.
The word Angels is a job description, they are messengers. Of course since we cannot access Angelic culture etc. we do not what they might call themselves or each other. just as Native Americans called themselves collectively as The First Nations for example. These entities created by God prior to our creation as the human race inhabit an invisible realm which we cannot see. They are active and on assignment for God with the exception of those who have rebelled, Demons, Satan. Listen to Joe Kirby explain the unseen realm.