interesting theory but i always thought maria/ celes was representing rachael. the lyrics:
"We must part now. My life goes on.
But my heart won't give you up.
Ere I walk away, let me hear you say.
I meant as much to you...
So gently, you touched my heart.
I will be forever yours.
Come what may, I won't age a day.
I'll wait for you, always..."
i wont age a day? sounds like rachael to me, maybe im just missing something