Based on the presented sources, the description of the second coming invariably focuses on the return of Jesus Christ himself, called the Son of Man, who will come from heaven with great power and glory.

The Sole Return: Jesus Christ’s Second Coming

Based on the presented sources, the description of the second coming invariably focuses on the return of Jesus Christ himself, called the Son of Man, who will come from heaven with great power and glory. None of the cited passages indicate that He will return together with God or the Holy Spirit.

For example, one excerpt states:
"His disciples asked, 'tell us when this will be, and what is the sign of Your (second) coming...' ... and they will see Jesus Christ walking on the clouds of the heavens with great power and glory." (source: link txt)

A similar description of the second coming is provided in another text:
"When Jesus Christ ascended, the Apostles were standing on the Mount of Olives watching the sky... Jesus Christ will come again to earth from heaven, and people will see Him as the Apostles saw Him ascending to heaven." (source: link txt)

These descriptions focus exclusively on the person of Jesus Christ and His return, with no mention of a joint coming with God or the Holy Spirit.

Supporting citation(s):
"His disciples asked, 'tell us when this will be, and what is the sign of Your (second) coming...' ... and they will see Jesus Christ walking on the clouds of the heavens with great power and glory." (source: link txt)
"When Jesus Christ ascended... Jesus Christ will come again to earth from heaven, and people will see Him as the Apostles saw Him ascending to heaven." (source: link txt)

Thus, according to the provided sources, the concept of the second coming implies the return of Jesus Christ alone, without the accompaniment of God or the Holy Spirit.