My favorite part was how her hair was in a beautiful and much more complicated knot in the premier episode, then it was a mangled mess after Voyager was thrown to the Delta Quadrant, but they make a show of her fixing it into the simpler knot with her bare hands while walking the corridors from one disaster to another.
Janeway commands, and her hair obeys.
She’s basically wearing a Gibson girl hairstyle. The pompadour is held up with a ring of something like foam or a hair rat, which is hair in a sort of netted tube sock thing. The rest is just swirled and tucked with extra hair pieces for fullness.