And one of the seven ANGELS who had the seven bowls full of the seven LAST PLAGUES, came and spoke with me, saying,
How interesting these ANGELS are! They are temple ANGELS (Revelation 15:1) and have had to deal out the worst PLAGUES upon the old earth, and yet, they are also privileged to show John the best of the new earth/heaven, the BRIDE. These ANGELS must be unique in appearance inasmuch that John recognizes this one as one of the seven ANGELS. We know that celestial creatures have unique appearances even as the four living creatures looked different from each other (Revelation 4). The implications here is that even the created ANGELS have some sort of genetic code.
"Come here, I shall show you THE BRIDE, the WIFE OF THE LAMB."
Even in the new earth/heaven system, one is invited "Come here,". Jesus in His old earthly ministry invited, "Come to me, all who are weary and heavy-laden, and I will give rest....for your souls." (Matthew 11:25-30). So here the ANGEL is going to show John these 'souls who are resting.' They are none other that those whose names are found in the book of life (Revelation 20:15), who have been blood-bought (Hebrews 9:11-22) and who have overcome (verse 7).
Using the term 'WIFE' indicates that the relationship between the LAMB (Jesus Christ - Revelation 5:6) and the BRIDE has matured. The LAMB and His WIFE will live together FOREVER; there is no more DEATH to ever terminate the relationship, because DEATH has been thrown into the lake of fire (Revelation 20:14).