If I edit a character that was created by a Final Draft import, will it update everywhere?

When you upload a Final Draft script, it automatically sets up your scenes, time of day, and characters.  You can definitely make adjustments; the feature is built for your convenience!

When you edit a character to give them the right aesthetic, it automatically applies to the rest of their appearances in the project.

For example, when I uploaded my script, Ralph (the man on the left) was the right body type but I wanted to change his height, skin, hair, shirt, and pants. 

At the moment, he is present in both scene 3 and 4.  However, I only edited him in scene 3, but his changes applied to both scenes.

I made him shorter, gave him brown hair, a light skin tone, a yellow shirt, and blue jeans.