1.) "Aeris is gone. Aeris will no longer talk, no longer laugh, cry... or get angry...
What about us... what are WE supposed to do? What about my pain?
My fingers are tingling. My mouth is dry. My fingers are burning!"
--Cloud Strife, City of the Ancients (Disk 1)

2.) "Say, Cloud. Have you ever been a bodyguard?"

3.) "I think they believe I have what it takes to be in SOLDIER!"

4.) "Cloud, why don't you dress up like a girl? It's the only way."

5.) "Cloud, help!"

6.) "I'm...... alone..... I'm all alone now..."

7.) "Cloud... I'm searching for you..."

These are the quotes taken form the game of Final Fantasy VII.
All of them but the first one are by Aeris.
The first one which is done by Cloud is my all time favorite quote in the game and is the most upsetting as well.