A mimic

Sophie: "A 'Mimic'? You don't mean to tell me that with this latest update, I could change forms at will?"

Scientist 2: "That is what we not only imply, but state with utter confidence, Your Highness."

Sophie: "Wicked. Let's get rolling."

You take a seat inside the familiar Gene Augmentation Tank, built with maximun practicality and comfort in mind for Your Highness. The door closes, and you pull out a breathing apparatus from the tank ceiling. The tank begins to fill with a viscous green liquid, in actuality brimming with quadrillions of nanobots which physically reorganize your genetic makeup, one cell at a time. Your cells are then given time to split and re-orient themselves, so that your physique can keep up with its genes.

After three hours or so, the process is complete, and the door opens with a seal-breaking *psssst*. You emerge from the tank, disoriented, but looking precisely the same as before.

Sophie:: "Whoo-ah... That took a hot minute didn't it! But I feel so... so buzzed and lively!"

Scientist 1: "You should test out to what extent you can exercise these powers, Your Highness."

Sophie: "Wonderful idea! Let's see now..."

You focus. A laughably easy task for someone of your superhuman intelligence. Finding that it's easier to change your appearance to reflect that which you see, you try changing forms into that of your lead scientist.

The change occurs blindingly effortlessly. Your body seemingly loses its muscle tone, your hair turns to a pure white, and your thighs flatten. You retract in height almost a head, your hair shrinks down and is re-adjusted to his moppy do, and even your nude body is covered with an artificial lab coat, strikingly similar to the real thing.

Sophie: "How's this look?"

The man adjusts his glasses.

Scientist 1: "Absolutely stunning! It's almost like looking at a mirror."

Sophie: "Fuck yea! Now I'll always be just as hot as I want. Thanks!"

Scientist 1: "All part of the job, Your Highness."

As you run off, the scientist considers for a moment whether it was a good idea to give the power of perfect disguise to such a volatile personality as you. But it's not his job to criticize the Queen, or her actions for that matter.

Sophie: "This is so. Fucking. Cool!"