Answer to the question:

How many Beings will be present at the Second Coming?

Answer. Only two Beings. The Father and Son.

Luke 9:26 For whoever is ashamed of me and of my words, of him will the Son of man be ashamed when he comes in his glory and the glory of the Father and of the holy angels.

Revelation 6:12-17 When he opened the sixth seal, I looked, and behold, there was a great earthquake; and the sun became black as sackcloth, the full moon became like blood, and the stars of the sky fell to the earth as the fig tree sheds its winter fruit when shaken by a gale; the sky vanished like a scroll that is rolled up, and every mountain and island was removed from its place. Then the kings of the earth and the great men and the generals and the rich and the strong, and every one, slave and free, hid in the caves and among the rocks of the mountains, calling to the mountains and rocks, "Fall on us and hide us from the face of him who is seated on the throne, and from the wrath of the Lamb; for the great day of their wrath has come, and who can stand before it?"

In the book of Revelation, the one who is "seated on the throne" is God the Father, and "the Lamb" is Jesus Christ.

"No human language can portray the scenes of the second coming of the Son of Man in the clouds of heaven. He is to come with his own glory, and with the glory of the Father and of the holy angels. He will come clad in the robe of light, which he has worn from the days of eternity. Angels will accompany him. Ten thousand times ten thousand will escort him on his way." —Review and Herald, September 9, 1899.

The Father is on the cloudy chariot that ascends back to heaven in the Second Coming of Christ.

Soon appeared the great white cloud. It looked more lovely than ever before. On it sat the Son of man. At first we did not see Jesus on the cloud, but as it drew near the earth we could behold His lovely person. . . . The voice of the Son of God called forth the sleeping saints, clothed with glorious immortality. The living saints were changed in a moment and were caught up with them into the cloudy chariot. It looked all over glorious as it rolled upward. On either side of the chariot were wings, and beneath it wheels. And as the chariot rolled upward, the wheels cried, "Holy," and the wings, as they moved, cried, "Holy," and the retinue of holy angels around the cloud cried, "Holy, holy, holy, Lord God Almighty!" And the saints in the cloud cried, "Glory! Alleluia!" —Early Writings, p. 35