Her being Sasuke's daughter is obvious. I didn't see it necessary to state that part.
If there really was someone there Sasuke would have noticed. Unless he's been reduced to fodder level after the timeskip.
Salad was following him.Think about it.Salad was watching Bolt pull off the Hokage mounment prank in order to get his dads attention,then Salad gets homes and talks about Bolt with Sakura,and says,"But you know...i think...he and i do have some things in common..."
Then in the next panel we see Sasuke and in Salad's speech bubble it says,"atleast when it comes to Papa",and on the next page we see Sasuke looking back thinking someones there then we see Salad in the shadows.
Bolt pulls pranks in order to get his dads attention,and Salad follows Sasuke in order to see him more - they both do things in order to get their Dad's attention - that is what the have in common.
And Sasuke not noticing Salad deosn't mean Sasuke's not as skilled as before - it means that Salad is really skilled - which is why She wasn't caught.
A true Salad Fan would notice this.