Little Cruz meets 51

A/N: Hey everyone this is my first Chicago Fire fanfiction, I've recently binge-watched the whole 10 seasons, so many emotions. So sad Jesse left, I'll miss him. Shay's and Otis' deaths made me cry. I wasn't expecting Otis to die. My favorites are Joe Cruz, he's sensitive, protective over those he loves, badass; what a friend needs, Herrmann the soul and heart of 51, Stella, Gabby. I could talk hours about One Chicago (Halstead brothers, Manstead, Upstead, Dawsey, Dawson siblings, Crotis, Brettsey, Stellaride). Anyway I'm not gonna ramble any more else this A/N will never end :p If you wanna talk about One Chicago, follow me on Instagram: cruzhawkinsfan

So Cruz being my favorite, I imagined him having a little sister which he never mentioned to 51 because he was ashamed for leaving her when she needed him while growing up. So my addition to the Cruz family is Sofia Cruz. Otis will be alive in this fanfic, Gabby and Casey never left.

Disclaimer: I don't own Chicago Fire, all rights belong to NBC. I only own Sofia Cruz and the plot. I have no medical knowledge. I made up the part about Joe's and Leon's parents since we have no info on them.

Today's the day, I, Sofia Cruz will surprise my older brother. Boy, will he be shocked to see me again after 5 years. God I miss his bear hugs. I decided to come back to Chicago because it's home and honestly I really missed it, My transfer got approved by former Battalion Chief Robert Sullivan and now nothing stands in my way anymore. Waking up bright and early, I put a black t-shirt and a pair of jeans on. I slipped my favorite sneakers on and made my way out of the apartment. 51 you aren't ready for another Cruz. I gotta say I'm a tiny bit nervous. What will Joe say?

The apartment I had rented wasn't far from the Firehouse so I could easily walk there. Thank God they weren't on a call so I needn't to wait. Some of them were outside doing some hose training, I spotted a blonde haired guy, who by the looks of it looked like the captain. I walked up to him, holding out my hand.

'Hi I'm the new recruit transfer from Station 19 from Seattle; Sofia, I'm looking for Joe Cruz. Is he around?'

'Welcome to 51 Sofia. I'm Captain Matt Casey. He frowned as I mentioned Joe but shook my hand nonetheless. Otis get Cruz please.' He said to a curly haired person.

Otis turned around and yelled for Joe to come out. I couldn't hold in a grin, Otis and my brother have to be friends. 2 minutes later there he was, the one and only, Joe Cruz. Holy hell those muscles!

'Hi big bro, missed me?' He ran forward and pulled me into a bone-crushing hug, knocking me down. I had really missed him.

'Wait did you say big brother? Joe I thought Leon was your only sibling?' Otis asked confused. The whole firehouse had shown up hearing the commotion. A blonde paramedic looked even more confused than Otis did. Great they never heard of me.

'Joseph Ignacio Cruz!! You never mentioned me?!

He sighed and knew he screwed up. 'I never mentioned Sofia because I kinda messed up. She had her life in Seattle. When I left for the academy, Leon began hanging out the gang and you guys know the whole story. Our father became abusive, he drank way too much and after a while Sofia left Chicago. I thought she'd never come back.'

I looked at Joe, hurt but I could understand him. 'It's okay Joe-bear I understand and forgive you. After I left, I went to the academy in Seattle; I wanted to step into your footsteps. I trained under Pruitt Herrera, may he rest in peace. I became friends with his daughter Andrea called Andy. Then I began working for Station 19 but something felt wrong. I wasn't home. So I asked for a transfer. I was nervous to come back and to see this muscle man here again. But here I am, ready to kick ass. I'm telling you, you aren't ready for both of us.'