A/N: I'm sooo close to being finished with uni and naturally in my last push my muse offers this tiny little thing.

It will be a six parter, title taken from Chicago because who doesn't love female killers?! It's being posted in Avengers because apparently Black Widow is not important enough for one movie but Iron Man, Cap and Thor deserve 3...


Pop

The Red Room had trained her for many situations but she never thought she'd be masquerading as a poor gypsy selling balloons to hit her mark.

The method to killing this eccentric inventor had plagued her for weeks, it had taken everything the Room had instilled into her to create such a far-fetched method they'd be talking of her kill for months, maybe even years.

She'd spent ages creating an airborne powder that wouldn't affect the balance of a helium balloon that when popped with an air gun would disperse and kill. She'd affectionately nicknamed it Femme Arachnidia, she was rather proud of the recipe; she'd adapted it from the Red Room's archives on Lucrezia Borgia but it definitely had her own touch, it could kill quicker.

Natalia thrust the balloon into her mark's hand speaking soft broken Greek begging for money but she jumped backwards when a guard intervened between the two of them. Her eyes wide and frightened, she made sure to scurry back at the sight of his piece before fleeing, leaving the bemused eccentric with the balloon firmly wrapped around his hand.

This would be luck.

She tailed them, having shirked her gypsy guise in a trashcan and now looked beautiful in a modest Greek dress, fitting in with the surrounding tourists. They entered the villa that the inventor was staying in and she edged the neighbouring building, having already marked the weak spots while retaining a good view to the man's private study.

Opening the balcony doors that would be just above his window Natalia leant against the rail, surreptitiously drawing out her knife. She had planned her escape through the empty apartment into the bustling square of the town below and off the small island as quickly as possible. Sizing up the mark below her she saw he had taken the balloon all the way through and she thanked her ever present lucky streak took aim with the childish BB gun.

The balloon popped and with the sight of the cascading white powder, she vanished from sight, leaving the doors open before she escaped into the thrumming crowds. She only officially heard of the inventor's death when she touched back down on Russian soil, wrapping her scarf around her neck a little tighter and grasping the handle of her carry-on bag strode to the airport like any other tourist around her. She looked like any other young woman arriving home but in her mind she was trying to decide whether Femme Arachnidia would be better out of a powder form and if she could refine it to a gas.

He had it coming, he had it coming, he only had himself to blame, if you'd have been there, if you'd have seen it... I betcha you would have done the same!