I see this by coincidence, but I thought I'd explain: The green one is Khidr, a mythical messenger and mystic. He can take any shape and brings the message of the woman to the man by spiritual means, thats why she feels where the messenger is. At the end, when he takes off the veil, he has the face of the waiting man. A lot is up to interpretation, for example the fact that we see his own face tells us, he might be presented the love but didnt see (the repeating part in the lyrics says "as long as this eyes cant see, how could the heart bear? Let us see again") or the mystics in the beginning and end are going into trance, so they might be the ones channeling the communication. take care.
