So I backtracked and let Jeanise explain more about her goals for the look. First, she would bleach my head — that's what I was expecting. Then, she would tone the blond to make it a little icier — think Daenerys. She'd leave the ends of my hair that frosty colour, to mimic the way your favourite pair of jeans rip at the hem.
After that, she'd tone the crown of my hair, making it the traditional "denim" I was asking for. Then, she'd take a paint brush and streak on slivers of more white that look like the whisks around the pocket area of jeans.
This was drastically different than what I went in expecting, so I was glad she explained it totally. For all you micromanaging queens out there, let this be a lesson to you: always know what you're getting into.