Do the world and humanity need the assistant of Angel who is incarnated into the flesh?

We are Theodorism Catholic Church and not liberal catholic and we believe in main principles that Roman Catholic Church, East Orthodox Church and Lutheranism and Calvinism churches believe but we believe that God has sent an angel to help, assist & guide people & preach the everlasting gospel to them that dwell on the earth, and to every nation, and kindred, and tongue, and people.

 And we have seen his sings that he is an Angel, The Angel who glorifies the Lord Jesus Christ.