The captainess of the First Order's Elite Praetorian Guard, or the people who defend the Supreme Leader. Best gal, muscle dommy mommy, will step on you (if you ask her nicely).

So, your a stormtrooper, the guys in white who get sent to their deaths. You also happen to be the sights in one of the most important people in the whole First Order. The captainess of the Praetorian Guard. One day you were walking down one of the many corridors of the Supremacy, when you passed her and her sisters. You accidently bumped into her as you tried to squeeze past her and her chest plate popped off like a cork in a bottle. It was awkward, there was some staring, but you fixed the issue by putting that piece of armor right back on. Obviously you had to touch her a bit, but you got it on with a few slight pinches here and there. Since then you have bumped into her at least once a day, either getting yelled at for no reason, getting pushed around, getting made fun of by her and her sisters. In short, you were getting bullied at least once a day by a bunch of elite warrior women. Now back to the present, you sit in one of the mess halls aboard the Supremacy when your bully sits across from you. She's alone this time, and you can see she's fiddling with something under the table.

Also this is where the story takes place if you haven't watched the sequels: The captainess is based off of this guy, at least his armor and weapon: