Flip the coin and experience one of the downsides for the first time

"I want to be an enchanter," you say, then you flip the coin. It rotates several times in the air and then lands in your hand, Venus side up. You had known it was possible, but you had expected to feel something. Instead, as you looked at the coin you noticed that your fingers were slimmer, your sleeve covering more of your hand as it was now too big for you. "Holy shit," you said.

"Getting a full feel for the coin's potential right out of the gate, it would seem," Emilia said.

"Guess so," you said, looking around. You saw a mirror in the corner and walked over to look at yourself. You saw a girl with shoulder length chocolate brown hair staring back at you. Blue eyes staring wide. And... you weren't really sure how extensive the other changes were. Your clothes and shoes were definitely looser, but because of that you couldn't fully grasp how much you had changed. If you were wearing something else you'd have a better idea. Your mind drifted to a sundress you had seen a girl wearing earlier...

And suddenly your reflection was wearing it. You could see the large breasts on your chest that were on display, plenty of cleavage. Hell, you were a total knockout, apparently. You let out a little gasp and heard a chuckle from behind you. Mr. Knight.

"One of my first projects here. A mirror that can show you wearing whatever you'd like to see yourself in," he said.

"Can't say I really meant to see myself in this, but it definitely works."

"Indeed it does," Mr. Knight said.

With that, you stepped away from the mirror.

"I can send Ms. Kensington to fetch some clothing for you if you'll allow us to get some measurements. I would imagine it to be more comfortable than your current attire. Consider it a sign on bonus."

You considered for a moment, then nodded. "Can't hurt."

You followed Emilia and let her get what she needed, then returned to the lab with Mr. Knight. He had apparently seen fit to go to work, looking over some notes and things on his desk. He barely glanced at you as you entered. "Welcome back."

"Yeah, uh... guess we're coworkers now?" you asked. "Um, moreso than you and Ms. Castle?"

"Mm, quite," he said. "I left a notebook open over there. Look it over and see what makes sense to you. I'd like to see where your current talent is."

You looked at the notebook and read the notes. It wasn't all that clear, but you were able to seize onto some of it. "I...hmm, is this for the mirror? Some of it seems like it would be. Illusionary work, reliant on intent from the user..."

"Correct," Mr. Knight said, smiling. "Very good. I must admit it will be nice to have someone else to assist with the work I've been doing. Not to mention that we have more possibilities with two of us present."

"How so?" you asked.

"Well, for instance I have been considering the coins themselves and their side effects. I was curious if there were ways to... alter how they affect us. Come here and look."

You walked over and looked at the notebook that he was looking at. Like with the notes on the mirror, you couldn't understand all of it, but some... "Is this... supposed to affect the Venus and Mars aspect of the coins? It looks like... a transference?"

"Exactly so. In order to potentially remove the change aspect of the coins I believe we need to have a deeper understanding. I have theorized the creation of enchanted tattoos that could affect how the change works between two coinbearers. Not simply altering the body but transferring masculinity and femininity between the two. Ms. Castle has been unwilling to assist with my research and I believe it to be because she lacks the understanding of enchantment that I, and now you, possess."

You looked over the notes with narrowed eyes. Even with lesser understanding than Mr. Knight had, you were fairly certain there were no traps in the notes. And if it worked you would become more masculine when the coin landed on the Mars side. You considered for a moment, then decided to...