Alex Rider crossover - what's your secret?

Chapter 7

They arrived in Washington and immediately headed for the NCIS headquarters. "Nice place." Alex commented. "Glad you like it." Gibbs said as he sat at his desk. "Come on Alexa! Let's go!" Abby exclaimed as she grabbed Alex's - Alexa, from now on - hand and Ziva's. "Wait!" Alexa exclaimed and Abby let go of her hand. Alexa pulled out the gun from her waistband and checked it. She also checked if she has ammunitions. "You have a gun?"
"Yepp." Alexa said and she tucked the gun back into her waistband. Then she locked the cuff in Ziva's safe. "Let's go!" Abby said and dragged them towards the lift.
******
They bought undergarments for Alexa, first. Then they went shop after shop to look for dresses, t-shirts, shorts, skirts, pants for Alexa. Then bought her different heels, a few flats and sneakers. Then they bought her a few bags and then a luggage which they put everything into. They bought her accessories too. They dragged her into the toilet and made her change into one of the dress when they are half way up the NCIS headquarters and Abby punched a level which was her lab's level. "Awesome lab!" Alexa said when they exited the lift. "I know right! Those are my babies!!!"
Alexa pulled on the long back short front dress and a high heel that was about 4 inches tall. It had a real thing heel. "Wow." Alexa said as she had wobbled a bit. "You can do it. You're a spy." Abby exclaimed and lead Alexa to the lift. Abby exited, followed by Ziva onto the team's level. "Where's Alex?" Tony asked. "It's Alexa, Tony." Ziva and Abby said. "Sorry. Where is she?"
"She's in the lift. Come on Alexa. Just walk normally."
"Like it's that easy! The thing is so damn thin. Why four inches?!"
"Because. Just come out. You look very beautiful if that's what you're worried about." Abby said. The sound of heels clanging against metal is heard and Alex walked out slowly, taking each step carefully. Tony and McGee's jaws dropped at the sight of Alexa. She's so beautiful. Gibbs looks pleased that Alexa was putting effort into her missions by preparing now. She manage to get to Ziva's desk. "You look stunning." Tony said. "I will kill 18 different ways with a paperclip if you hit on me."
"Oh my... Ziva said the same thing once." Tony said. "Mossad right?" Alexa asked Ziva. She nodded. Mossad taught them to kill with small objects. "Who's that Gibbs?" A voice called from above. They looked up. "Director Vance. Nice to meet you. I'm Agent Alexa Rider. MI6." Alex suddenly can walk at a normal speed towards the director and shook his hand. "Ah. I've heard a lot of things about you. Good things."
"I'm glad to know that they are good things." Alexa joked and Vance smiled as he got the joke. "Alright, I guess now's the time." Vance said. "What time?" Tony asked. "Agent Alexa here is gonna work with us for a bit as a liaison officer for the federal agencies."
"Agencies?" Gibbs asked. "Yep. I have connections with CIA, MI6, MI5, FBI, CSI." Alexa said. "Wow. That's a lot."
"That's why I was chosen as the liaison officer."
"So we have to get a desk for Alexa?" Gibbs asked. "I'll arrange it." Vance said and went upstairs. "Alexa!" Abby squealed. "What?"
"You're walking normally!!"
"What?!" Alexa said and suddenly lost her balance. She immediately stretched her hands out and did a hand stand before pushing herself off the ground and landed up straight. It's like doing a somersault. "Nice."
"Thanks?... I got it!"
"What?"
"Do you guys have anywhere you guys train?"
"Yeah." Gibbs said and lead her to the gym downstairs with the team following. Alexa picked up a long wooden stick. She swung it around. "What's a little girl doing here?" A guy asked. "Watch what you say about my agent." Gibbs said. "Agent?"
"Yep. She's a liaison officer for federal agencies." Tony said, stressing on the word agencies. "Tony, is he working on the team?" Alexa asked. "Nope."
"Then stop saying so much to him."
"Hey little girl, don't hit anyone with that stick of yours and kill them by accident." The guy said, smirking. Alexa walked to him. The guy smirked widened. He had the height advantage after all. Nah. Alexa lifted the stick off the ground slightly and slammed the end of it into the guy's foot. "Ow!!! You little bitch!" The guy lunged at her. She swept at the guy's legs causing him to lose balance. Alexa straddled him and pinned his hands to the ground with her knees. She pressed the stick to his throat. "I can kill you with a lot ways from this position. You're defenseless. I can crush your windpipe. I can choke you. I can slit you throat. I can break your nose and cause its bone to push into the brain. I can beat you up until you're unrecognizable. I can stab you. Or I could just shoot you, that's faster." Alexa said in this calm dangerous tone that made it seem like the room's temperature dropped. "I don't mind killing if that's what you're wondering." Alexa stood up and helped the guy up. She walked away, still swinging the stick around.
This kid is something else. She's cool.