What did Zack contribute to the original FF7?

[Lone Wolf Leonhart]

I was having a hard time figuring out how to word the title.

Other than the information you find out during the events of Final Fantasy 7, how did Zack effect the original game?

Here is two off the top of my head:

-He bought Aerith's trademark pink bow in her hair

-He named the bar "Seventh Heaven"

-Gave Aerith the idea to sell flowers


Add to the list.