Casey's P.O.V.

Even after almost 7 years I still wasn't completely comfortable around Hank Voight. The whole firehouse and Intelligence crew was currently being quarantined in one of the waiting rooms at Med. We reported to a fire that Intelligence had responded to. There was something in one of the rooms that was hazardous so for precaution our blood had to be tested. We were currently waiting for the results when Will and a woman I didn't recognize walked through the door, wearing no hazard suits if I might add. The woman had long brown hair with bright blue eyes. She was average height for a woman.

"Hey guys so you are in the clear, but while you all are here I might as well introduce you to Doctor Reyna Petrov." She smiled at all of us, looking us all over, but when her eyes went over Voight her smile faltered. Maybe she has a history with him too. Everyone went to meet her, shaking her hand and everything. I was one of the last because I was in the corner of the room.

"It's nice to meet you, I'm Matt Casey." I shake her hand sort of awkwardly. She just smiled warmly. I could tell that she made a pretty good doctor.

"Rey."

"Well I don't know if Hermann has invited you, but we all normally go to Molly's after our shift if you want to come tonight." Will's head has sort of popped up slightly.

"We've been trying for the past week to get her to go, but she always has an excuse, I had to basically drag her in here." That got everyone's attention, and the peer pressure plus Brett and Kidd's puppy dog eyes piled up.

"I would love to…" Her phone started ringing.

"Hold that thought, sorry." She walked away a couple of feet, but it wasn't far enough that we couldn't hear what she was saying.

"Babushka is everything alright? [...] Alright I'll be there in 15 minutes. [...] Lyublyu tebya" She walked back over. Will was already sighing.

"I would really love too, just not tonight. Thanks for the offer though." She said goodbye to all of us before going to I guess change before leaving. I turned to Cruz who was standing right next to me.

"Do you know what those three words were that she said?"

"Grandma and then Love you. If she said that whole conversation in Russian I would not have gotten any of it." The rest of the people were just talking to each other. Connor and Natalie had also arrived in normal clothes, and were talking with Will. I decided to walk over to them to hopefully get some answers about her. I didn't like mysteries.

"I didn't know you guys were getting a new doctor." Before they could really answer Jay came walking over. He looked semi mad.

"Will why did Voight just ask me to run that new doctor's name through the system." Can you even do that when it's not for a case? All three of the doctors looked down slightly, and then Nat and Connor looked at Will.

"Look if either of you tell anyone this I will kill you. Rey's last name before she legally changed it when she was 18 was Voight. She's Hank Voight's biological daughter." Huh. They obviously didn't get along.

"Why would he need Jay to look up her file." He was a sergeant and she was still his daughter no matter what shit they've gone through. Why did he need Jay to look her up for him. Will sort of just smirked at this.

"It was the only way Sharon could get her to transfer here from Johns Hopkins. She's the most sought after neurosurgeon in the world. Sam basically begged Sharon to try and get her." She must have been good.

"Why would she even come here if Voights here?" Wouldn't she want to get as far away from him as she could.

"Look I don't know. If you want to know why she came back try and get to know her. Just don't judge her because she's a Voight. She probably has more shit with Justin and Voight then you." Jay sort of started to question this and so was I to think about it.

"Will, how do you know so much about her?"

"When she was sixteen she ran away to Dc where her grandparents lived. I might have been leaving for college that same day, and she somehow talked me into taking her…"

"Will you took a minor across state lines?"

"Yes, but I wasn't finished. I insisted on meeting her grandparents, and knew that if she tried to make up an excuse I would drive back to Chicago and call CPS. Her babushka got me into having dinner with them that night, and it sort of became a common thing when I was in Dc. She's like my little sister."

"Why have you never told me?" Jay looked a little hurt.

"She asked me not to with you working with Voight and all. She didn't want to make it awkward for you. Don't worry though she's been really excited to meet you, and she can always use more brothers." So Jay wasn't hurt because Will didn't tell him. It was because Jay wanted a sister. It made sense the Halsteads really only had each other.

"So you know what problems she has with Voight?" I knew it probably wasn't my place, but I heard the words coming out of my mouth anyway.

"Let's just say she had an entirely different opinion on how Voight should've handled Justin and a lot more. She thought that Voight should've let him go to juvenile detention or get arrested. Rey thought it would set him straight." She must've only been a kid if Justin could've gone to Juvenile when she first thought of this.

"Hey you guys coming to Molly's?" We all sort of just followed Hermann to the trucks to go end our shift. Then we all went to Molly's for celebratory 'you're not hazardous' drinks.

I couldn't stop thinking about Rey. I don't know what it was about her, but I was drawn to her. I wanted to get to know her. Maybe it was because we were connected to Voight. I had no idea.