Rotate an entire game object, not all children of object individually

I have a game object, “sword”, that contains 5 children, all the parts of the sword. (If you know a way to combine all of these into one, that would also be an acceptable answer to my question). Anyway, I have a script to rotate it, but when I run it, it just rotates all the elements of the sword individually instead of the whole thing. Is there a way in Unity to rotate the whole sword, and not all the individual parts of the sword? Thanks!

the pivot of all the sprites needs to be on the same point relative to each other