BBC Sherlock (and others in the show) x reader oneshots

The Siren (Mycroft x reader)

I walked down the streets of London, anxiously waiting for someone. Excitement flowed throught my veins, feeling like pure electricity underneath my skin. He was getting closer. The electricity bounced around in my palms before running up my spine and into my brain. I had been busy since my arrival in London, you know killing and all that. After all that's what I do, kill. With Moriarty's death, it was now more important than ever to reassert my place in the ranking of crime. With others gunning for Jim's throne, I had to be extra careful with how I went about things. Jimmy always did like me, said I was his equal. He though too highly of himself to realize, but I had let him get away. He was the one man (or woman for that matter) who had escaped this femme fatale. He could really be so sweet sometimes, saying that he cared for me and that he loved me. I said the same things back. We were both liars. I quivered in excitement as I started to run. This was my favorite part: the chase.
     Mycroft Holmes had been my pet project ever since I had gotten to London. I had called dibs on him since Jim had gotten Sherlock, and I must say, he has been rather amusing. I loved to watch him puzzle over my killings, deducing away and always arriving at the same conclusion; the Siren.
   All of us assassins have a nickname, even if some don't know of it.  I go by many names: The femme fatale, The Angel of Death, The Widower, Bloody Mary, The Raven, The Tell-tale heart, and, my favorite: The Siren. I could hear him catching up, yelling after me. He rarely liked getting his hands dirty with field work, I guess I'm special. I watched him become stuck, become consumed with catching me, with solving me. Usually that was more of Sherlock's field but this was too important to hand over to his little brother. Too dangerous. I giggled with excitement as he approached me. It was late in the afternoon and the sky was beautifully gray. The air had that rainy scent that I loved. Yes, this was the perfect day to go to jail, to let him win. I stood in the middle of the park, facing upwards and letting rain pour down my face. It was exhilarating. He had caught up, he held an umbrella over his head, keeping him dry as the rain poured around him. That's what he was. The calm to my chaos. The cold to my burning heat. The umbrella in my rainstorm.
"I know who you are." He said while catching his breath.
"Oh really, dear? Do you? If so, who am I?" I asked, my back turned to him as I smiled.
"You are The Siren," he replied.
"Oh pity! I was really expecting something from you. Maybe you Holmeses aren't that smart after all."
"But I am right." He said a bit confused and offended by my answer.
"Oh you definitely are. That's just not the answer I was looking for."
He seemed to be a bit puzzled before going back to what he was originally going to say.
"Why have you been killing these people?" He asked.
"I'm an assassin, I'm paid to do it." I snarkily replied.
"But that's not all there is to it, is there?" He said, raising one eyebrow.
"Oh you're very clever Mycroft Holmes, but you fail to realize who you are in all of this."
"Well then, who am I?"
"The fool."
I turned around to face him as government helicopters beamed their lights down on me and soldiers with guns dropped down from them, their guns poised to shoot me.
"How am I the fool? You are the master criminal and yet you have been caught by me."
"Has it ever occurred to you that I wanted you to catch me?" I said while smirking.
"Why?" He asked as men in bulletproof vests put handcuffs on me and escorted me into a helicopter.
I sat down inside it and Mycroft sat across from me.
"Why? Because you've piqued my interest, Mr.Holmes."
He stayed silent for a few moments after I had said that.
"I also have dibs on you." I added.
"Dibs? Who were you calling dibs with?"
"Let's just say he's a very old friend that your brother knows far too well." I replied, picking at the pieces of lint and other crud underneath my fingernails.
He seemed lost in thought for a while, probably in that wonderful mind palace of his, thinking of where he last saw me.
"See! This! This is why I chose you!" I exclaimed
"What do you mean?" He questioned.
"You think deeply. You notice things, subtle hints that most people wouldn't. You're extrordinary! The game wouldn't have been as fun without you."
"You sound like Sherlock talking about the 'game' and all that."
"Oh I know, I knew someone who used to always talk about it too." I looked away at the sky outside our window. Jim had always talked about it. Maybe I wasn't entirely lying to the consulting criminal.
We were silent for a few moments after. In that silence, when he had turned his attention to his thoughts, I studied him. I was clear through his attention to detail that he had OCD, he worried often, judging by the lines on his forehead, and has good manners which are suggested given his posture. He was quite handsome and that was enhanced by his intelligence, but then again I'm a sucker for men with British accents.
"You know, I can feel you staring at me." He said, still looking out the window.
"I know," I replied with a smirk.
"Once again, why did you want me to capture you?"
"I just wanted to let you win for once, I'm a voluntary victim." (Author's note: This is a reference to the song Mad IQs by IDK How, just so you know. Also, go listen to it! It's great!)
"But I don't see why you set up this 'game' for me."
"I like to watch you play the game, you get really interesting when you notice a pattern. By the way, why do you always carry that umbrella?"
"It's useful."
"Ah, but that's not all, it has some sentimental value to it. And here I thought you were totally against sentiment."
"It's an umbrella, just that."
"Okay, fine." I said, I was giving up for now.
"You do understand you are a famed assassin, and will face years in a high security jail for your crimes because you let me catch you."
"Well, love will make you do the strangest things." I said with a sigh. (Author's note: Sorry this is another reference, I can't help it! This is a reference to Love Will Make You Do The Strangest Things by Dirt Poor Robins.)
"Love?" He inquired.
"Well I love the chase, the mystery, and the person who tries to solve them."
"The person who tries to solve them?"
We had landed in Sherrinford shortly after he had said that.
"I'll leave you to ponder that." I said as I was being escorted out of the helicopter.
     The skirt of my black dress billowed as the helicopter blades slowed to a stop.
In all honesty, my feet were killing me, I was wearing heels after all. Even if they weren't that high, I had still run in them. Why was I so dressed up to go to jail? Because if I was going to go out, I was going out fabulous.
"This is Sherrinford, your new place of residence for a very long time."
"Oh I know, where else are you going to put me? I'm too dangerous for public prisons, but I'm not half as insane as some of the people here. But this is the safest option."
"They're going to take you to your cell now, where you'll spend your time in solitary confinement. You will be provided with a book or two for entertainment."
"You mean I get to read and no one is going to bother me! You really shouldn't have Mycroft!"
I stepped closer to him and he seemed to stiffen and the guards seemed to tense as well.
"Oh relax Mycroft, you know I'm not going to hurt you. I've worked too long and hard for that. Now can you please tell them to take these cuffs off, they're really starting to dig into my wrists."
A guard looked to Mycroft for an answer and he nodded in response and motioned for me to hold out my wrists. I did so and the wretched things came off.
"You, Mycroft, were obsessed with solving the case and catching me, but you know who I'm obsessed with?" I stepped closer.
"Who?"
"You."
I pulled him in by his tie and kissed him hard. His lips were quite soft, and my chaos felt quieted. I was no longer standing in the rain, but I was under his umbrella.
    He seemed quite shocked when I broke away. I smiled at him, a genuine smile. I walked towards the entrance of the prison, escorted by guards on both sides of me.
"Toodles, Mycroft! You make sure to visit me here!"
He stared at me, still shocked into silence. His face was incredibly pink.
The heavy doors closed behind me as I had entered. I would see him again, I was sure of it.
This is going to be fun.

Author's note: The tale of the siren continues in part 2! I didn't want to make this chapter too long so that I could publish asap. I hope you enjoyed it!