The "Mister" modifier is a term used for junior officers. Best case of it being used is in Wing Commander Academy series, when Tolwyn would call Maverick "Mister Blair". Sometimes when a poor junior officer gets reprimanded, they like slurring the Mister modifier, as if it's some sort of profane statement. Like this example . . .
"Mister H****, you are a piece of fucking shit, sir. Go get wet."
Chief Warrant Officers, in the Navy, are technicial specialists in their field. It's not really a specialized officer rank for stuff like JAG, or Supply, or Chaplain (that's Restricted Line Officers). You have to be at least a Chief (E-7) before you can put in a package for Warrant. I have the highest respect for Chief Warrant Officers, cause they see both sides of the coin.
I don't know about the other services, but Navy wise, we just call them Warrant or Chief Warrant, "Hey Warrant, I got a question . . ." Certainly don't call them just "Chief", cause they used to be Chiefs before getting picked up for Warrant and they'll take offense to it. I learned this the hard way one day; I had to stay behind for some "extracurricular activities" after the day was done and ended up doing about five-hundred 8-count bodybuilders for my punishment.
Also, best thing to remember is that the Black Lance is a Special Ops unit. Rank is very very less defined between seniors and subordinates, to the point of fraternization. A person will be tapped to lead an operation or a unit based on his merits and reputation, not by rank.