As the editor, you will be tasked with editing both the Animatic and the finished animations.

For the animatic you will need to tween some elements of the storyboards and, if needed, you can use your own SFX/Voice Acting, or just ask for some temp SFX/Voice Acting when needed. 

For the finished animation, specific SFX and Voicelines will be supplied instead, and you might need to make some transitions between animation clips.