Author's Note
I'm gonna add some BSM (brother sister moments) to the book.

Harry's pov
About a few months ago, my family and I went to the adoption center to adopt a 12 year old named Y/N. My sister, Gemma, and I were so excited to have a little sister to call our own. When we finally met Y/N, we were surprised to see she was a borrower. She's only an inch in height so she's really tiny. She was really scared when we first met her because she was abused by another human. It took her a while for her to get used to us but now we're all best friends. Y/N likes to snuggle when she's lonely. Like today she felt lonely and Gemma was out of town for the day so I went up to my room, went over to her little house that we built her on the nightstand, saw her sitting outside the house, and placed my hand down so she can climb on. "Do you wanna come watch a movie downstairs with me?" Y/N looked at me nervously like she normally does but only because she's still trying to get used to me. "I-I'd love t-that." She said as she stuttered. She really loves hanging out with me despite her nervousness. I felt her tiny body against my hand as she climbed on. She stopped in the middle and curled up on my palm. I slowly picked her up, cradled her against my chest, walked towards the living room, sat down on the couch, and gently placed her on my chest so she can snuggle.

Y/N's pov
It's been a few months since the Styles family adopted me and so far it's been an amazing experience. I've always been a huge fan of One Direction, especially Harry. When I first met Harry, I was both excited and scared because I thought he was going to be like every other human I've encountered. Plus, I've always heard people say don't meet your heroes. His sister, Gemma, and I became best friends instantly but it took me a while to get used to Harry. Now he let's me snuggle on his chest whenever I get lonely. He literally has the biggest heart out of anyone I've met. "Hey, Harry? Can I ask you something?" I asked as I looked up at him while still snuggling. "Sure. You can ask me anything." Said Harry. I took a deep breath. "You didn't think I hated you when we first met, did you?" I asked. "No. I didn't think that at all. You were just scared. I already knew you were a fan and you were caught by surprise when you found out I was gonna be your big brother." He said as I felt his gigantic finger rub my back. "You and Gemma became best friends and she helped you get used to me. I was caught off guard when we found out you were a borrower. All my mum said we were going to be surprised with a new little sister. And you wanna know something?" I looked up at him again. "It was even better then we expected. Gemma and I have always wanted to meet a borrower and this little borrower happens to be our new baby sister." I smiled at his kind words. I was really surprised when he said he always wanted to meet a borrower because a lot of the humans that I met always hated borrowers. "I'm really glad you said that because a lot of humans have hurt me before I got put in the adoption center. All I waited for was for someone who was willing to give me a nice home where I can be safe. The reason why I was nervous when you guys adopted me is because people always told me to not meet your heroes and your my hero." I said as I was nuzzling deeper into Harry. Harry was wearing a cozy sweater (jumper if you're from the UK) which made it even better.

Harry's pov.
I love the fact that Y/N thinks of me as a hero. I've always considered myself a hero because I love making people feel happy, especially my fans. "Well, people normally say that because there are people in the media that are very rude to their fans. I never liked seeing that because I always want to treat people with kindness and respect. I'm the type of hero that everyone should meet." I said as I gently picked up my little sister. "Not only are you my biggest fan but you're also my baby sister." I brought her in and gave her a gentle kiss. I pulled her away after about 10 seconds and put her back down on my chest. "You're a good kid, Y/N." I gave her a hug. "Thanks, Harry. You're a good brother." I'm so glad we adopted Y/N. She's the best little sister that I could ask for. Not only is she a borrower but she's also my biggest fan. I couldn't have asked for a better little sister.