One shot: Princess, Princess.
I really liked the idea of bringing in/introducing Mukuro (and Junko too, I guess) like this.

Sonia. I cannot sent letters anymore. Please forgive me, but it must be done.
-Gundam

Those two (technically three) sentences sent my heart crawling up my throat.

I reread once. Twice. A third time before my eyes felt like they were spilling over with tears. It wasn't long before they did begin to fall, splattering Gundam's neat handwriting and causing the ink to bleed.

"Sonia?"

"I'm fine," I whispered, touching a finger to my eye to wipe away the tears. The movement didn't stop them, and I hastily did it again. "Really."

Sending me another doubtful look, Chiaki shuffled her feet. "If you say so..."

"It's just..."

Leaning over my shoulder, Fuyuhiko cocked his head. "Whose's...Gundam?"

His voice held a little uncertainty, along with something else I couldn't detect.

"A...friend of mine."

Friend. It was a word I had grown to dislike, and that very reason for it was Gundam.

How many letters had we exchanged over these past few months? Dozens?

The number was large enough to like Gundam more then a friend. Through his handwriting, I mentally bonded with him. I learned his quirks, his fears, his family members.

Was he really that willing to stop.

"-nia?"

Shaking myself out of my daze, I caught Fuyuhiko's hand before he bopped me on the nose. "Pardon me, I was thinking. What do you need?"

Not having noticed that Fuyuhiko had snatched up the letter, I stiffened as he waved it in the air.

"It's clear Gundam was instructed by someone, by the way he says 'it must be done'," Chiaki mused. "He even sounds a bit depressed at this..."

"I'm sure caring for Peko and Nekomaru are draining him. Nekomaru's arm and leg had to be replaced with automail, and Gundam has to supply that money."

Fuyuhiko's gaze drifted over to me, concern lurking behind his one eye. It was rare when he expressed such emotion, so I lifted my head higher to show I was paying attention.

"...Peko?"

"Yes, Peko," I nodded. "Does the name strike a memory?"

His lips pressed into a thin line as he studied me for a moment. "No, it's nothing."

"You want to see Gundam again, right?" Chiaki asked.

Cocking my head, I stared at her for a moment, considering the truth in her words.

Then I laced my fingers together and brought them to my chest as if in a prayer. "Yes."

Princess, Princess

"Sonia, can you see Fuyuhiko's light?"

I stopped pressing my ear to the crack in the door to hear Chiaki, and instead turned towards the window. Several flickers of light appeared in the darkness.

"Yes."

"Good...you know Morse Code, right? Fuyuhiko's sending signals to you by Morse Code."

"Okay," I nodded as the said Kuzuryuu started flicking the flashlight on and off to spell out two words.

M-O-R-S-E-C-O-D-E

"All right," Chiaki breathed. "Let's hope he shows up..."

Her footsteps faded away and I released a breath, smoothing out the ruffles of my shirt to soothe my nervousness.

Several minutes passed as I waited a signal from Fuyuhiko. Then:

I-S-E-E-H-I

He cut off abruptly, the light going dark.

Nothing.

Had he forgotten about the M?

Just as I shuffled closer to the window, something red spiraled out of nowhere, slamming into the glass.

I screamed in response as several sharp bits of glass dug into my skin, and the flashlight bounced on the floor. "Fuyuhiko...!"

Grunts and short phrases could be heard through the chaos, and I swept the flashlight off the floor, aiming the beam towards where he used to be.

Frozen stiff, I could only watch as the yakuza's body- beaten bloody- fell off the rooftop and on the ground. In his place...

My gut twisted at the cold look in her pale, silvery-blue eyes. "Sonia Nevermind..."

The glint of the blade she held loosely in her hand blinded my eyes, but the blood upon it was all too clear.

"That...that's my name," I got out.

Glancing down at Fuyuhiko, who groaned (and thankfully still alive), the attacker leaped from the rooftop onto a closer one. She repeated the process until she reached the one closest to my window.

Having a closer look, I could see scars etched on her skin, although pale and rather hidden by her black bangs. Besides the bruise beginning to form on her cheekbone, it seemed that Fuyuhiko hadn't landed any blows.

"Princess Nevermind, my name is Mukuro," she lifted a hand to reveal a small wolf....scar on the back. "My sister and I need you for an experiment."

"No," I stated firmly.

Mukuro ignored my word. "Move away from the window," she commanded. More in awe then fear, I took a step back from the window. She jumped, catching onto the part jutting out and swung herself into my room.

"Of course, if you are resistant against it, I have been given permission to kill you since we have Prince Byakuya of the Togami family."

As she spoke, Mukuro brought out a smaller switch-blade (smaller compared to her sword- the former was just a bit shorter then her forearm). "What is your answer?"

I had always been fascinated by those who committed crime and murder- a rather crude and unhealthy liking. But here, in my room, standing in front of a girl no older then me who had just almost killed Fuyuhiko, my interest in them had disappeared.

For the time-being.

"Do I have time?"

The question flew out before I could consider it.

Cocking her head, Mukuro studied me with her pale-blue eyes. "Do you have...time?"

"To mull over my answer, yes."

"I suppose that can be arranged," she mused. "Alas, my sister might be mad at me..."

As she spoke, she gingerly touched her neck. I could almost see fear in her eyes, and upon looking with more keenness, I could see a scab where her fingers had touched, along with red marks that were in print of a hand.

This...sister of hers...the thought made me shiver, out of either fear or excitement of meeting her.

But at the sight of the emotion flashing through her eyes, the urge to spare her whatever was coming emerged. Kindness.

"It's quite all right if I go now," I said. "If it's to spare you from torture. Just...just don't harm my friends either."

Mukuro uneasily shifted her weight from left to right. "Well..." She murmured. "This certainly took an interesting turn. Isn't what usually happens is that the princess refuses and the captors capture her, hence their name?"

I nodded, and held out my wrists."Promise me you won't hurt my friends."

She turned and offered me a thin smile, one which caused her pale eyes to become even more eerie, but said nothing.

My eyes flicked down to the switchblade still in her hands, tilted in a way that it caught the gleam of the moon. "Well?"

Chains snapped over my wrists and before I knew it, she had expertly bound a rope around them as well.

"I never promised. If my sister wishes to hurt your friends, I will not stop her. I'm just doing what I was instructed to do."