Some get a little confused with the mention of more than one messenger in Zechariah 2. Please read the chapter very carefully.
Let us refer to angel A and angel B.
"Then at this point the angel who spoke with me went forth ..." [angel A] " ... and another angel came forth to meet him." [angel B].
Verse 4 - "And he said to him, Run, speak to this young man, saying, Jerusalem will lie as an open region .... etc."
I take this as probably angel A, who is busy going for the measuring of Jerusalem, telling angel B who has come forward to accompany him, to run with the word of God to Zechariah. (Possibly it could be the other way around).
What effect does this have on these words ?
" ... for now I am coming, and I will dwell in your midst, declares Jehovah... and I will dwell in your midst, and you will know that Jehovah of hosts has sent Me to you." (v.10b,11b)
Which do you believe?
1.) Jehovah (or JHWH) will dwell in the midst of His people, is told to the prophet twice by God?
2.) Jehovah (or JHWH) will dwell in the midst of His people, is told ONCE on behalf of God and ANOTHER TIME, on behalf of angel B?
If #2 is your choice then you believe [b[" ... and I will dwell in your midst, declares Jehovah" [/b] stands of God's dwelling in the midst in v10. But " and I will dwell in your midst, and you will know that Jehovah of hosts has sent Me to you." stands for angel B dwelling in the midst.
I do not believe scenary #2. For the significance of GOD dwelling in the midst is vital and requires REPETITION. And in the repeating God is the Sender and the sent One saying TWICE that He comes to dwell in the midst -
The whereabouts of angel B dwelling is not that important. What is important is the dwelling of the speaking God - " I am coming, and I will dwell in your midst, DECLARES JEHOVAH " (v.10)
Then reinforced and repeated -
" ... and I will dwell in your midst, and you will know that Jehovah of hosts has sent Me to you." (v.11)
The Dweller in the midst = God. The One sending the Dweller in the midst = God.
It is no wonder that we can see God comng as the Divine "We" of the Father and the Son in John 14:23. And furthermore the chapter speaks of the coming of the Holy Spirit, the "another Comforter" Who is the Spirit of reality.
It has to be that the Father and the Son are imparted into believing men by means of the dispensed Holy Spirit. He brings the Triune God into man.
What the Trinity is can never be separated from the operation of the Trinity to dispense and impart God into man.