Though she's the youngest of the group, Sarada mostly acts as the middle child and leader of the trio, often coming up with the most ideas when going off on missions.  She gets along pretty well with Ochako, who often comes to her for taijutsu training and long-ranged combat advice.

To me, she mostly sounds annoyed and chilled in both sub and dub, so go with that if you'd like, or do your own thing.