Izaya's missing Sister (Durarara fanfiction)

chapter 3: going back to Ikebukuro

Illia/Yuki's pov 
I was in my room when I heard a knock on the front door, I looked out my room and saw Auntie at the door  talking to someone, she moved and my eyes went wide seeing Izaya!
Auntie: Yuki, someone is hear for you
I felt all my hairs on my neck stand on end and a shiver down my spine as I see Izaya smirk well looking at me, how did he find me?!?!Auntie let Izaya in and closed the door, he was still smirking.
Izaya: thank you for letting me in, you have a nice home
Auntie: thank you, follow me
Izaya gestured for me to follow so I did and with in a few minutes we were all in the living room sitting at the table, auntie and uncle were across from me and izaya, I felt very nervous and on edge sitting next to him.
Auntie: soooooooooo how do you know Yuki?
Izaya: that's a long story, you see, Yuki is not who she says she is.....
Auntie: what do you mean?
Well they were talking I managed to sneak away and to my room, in my room is a door to go outside and a rock path going into the forest and to my hideout, I made the rock path myself a long time ago, I ran as fast as I could and went into my safe place and closed the door then curled up in a corner of the small dark room and waited.
Izaya's pov 
I finally got to the island and scoped everything out and no sign of my sister, I then see her walking out of a cave with a guy in his 30's! Wait what?! If he did anything to her I will kill him! I stay a ways away and out of sight and follow Illia to a house and I see her walk in and I smirked and walked to the house and the front door and knocked, a lady with light wavy brown hair answered the door, I told her I was here for Yuki, she assumed I was Yuki's friend, god I hate calling her by that fake name, once in side I see her and I can't help but to smile, she looks a bit scared to see me though, I honestly thought that she would be happy to see me. I use my hand to motion for Illia to follow me, she dose and she sits next to me as the 2 older people sit across from us.
Woman: soooooooooo how do you know Yuki?
Me: that's a long story, you see, Yuki is not who she says she is.....
woman: what do you mean?
Me: her real name is Illia Orihara, she is my little sister.......
Woman: oh, I see
At that moment I noticed that Illia is not next to me anymore and I got up
Me: i'm here to take her home, legally you can't stop me
Woman: you have not been her Guardian for a long time, this is her home and she won't just pack up and leave with out a fight
Man: she is right, everyone on this island knows her as Yuki
Me: I see, where is she?
Man:...........
Woman:..............who knows 
Me: fine I will find her on my own!
I then see a kitten? It's black with blue in its fur? That's the cat that I saw Illia with, the cat meows and took off running so I ran after it, after about an hour of chasing the cat around I see it go to a rock path going threw the forest and up a hill, once up the hill I see the cat run to a huge rock and vanished? I run over and see a door? I open it and I see Illia! The little room she is in has a few things here and there, I see that she has her back to me and she looks like she is doing something.
Me: there you are
Illia: -turns and sees me- i.....Izaya...... how did you?
Me: it was not that hard, all I had to do is follow the cat
Illia: -to the cat- YUMI!
I laughed some and she sighed picking up the kitten and petting it
Illia: this is my pet Yumi
Me: she is cute
Illia: ya..........why are you here?
Me: I'm here to bring you home
Illia: this is my home Izaya
Hearing her say that hurt a lot but I kept from showing any emotion
Me: no, Ikebukuro is your home
Illia: no, please don't make me go back there izaya
Me: well that's where I live and I'm not leaving here without you
Illia: i'm not going with you!
Me: too bad because you have too, I'm your legal Guardian!
I see her curl up into a ball and start to cry and I hug her tightly.
Illia's pov
He has no idea what my life was like  back in Ikebukuro was like, I had no friends, I was bullied, how much pain I was in, it all started I think when mother and father left Izaya and me and I could do nothing to stop it, izaya told me that everything was going to be ok but I could not help to wonder:"was it because of me? The reason why they left? What did I do wrong?" That was the first time I saw my brother so broken, so powerless, he kept telling me it was not my fault but I felt like it was, like I was a bad kid or something, he would always tell me:"we will be ok I promise" and "we don't need them to be happy" and "Stay strong, we will be ok", so I kept telling myself that everything will be ok, we will be happy again, but everyone I talked to was so cold to me, called me names, the only person that was there for me was Izaya and I hurt him........i'm a horrible person and he is here hugging me now?! How could he be so loving to someone who hurt him more than anyone ever could? I could not stop crying and I'm now in his arms crying and telling him over and over that I'm sorry for what I did, every time I close my eyes I see the pain I went threw in school, the bullies, and how I tried to stay strong, I was beaten up during lunch and how I would always want to know why, why were they doing this to me? Then I remember how izaya was always there to protect me and the pain I put him threw just so I could be happy, he looked for me for years, how stupid I was for what I did to him, then feeling him hug me as I cry somehow makes all that pain and sadness in me go away and I looked up at him with tiers in my eyes and what I see is not anger but deep sadness.
Me: how could you ever forgive me for what I've done?
Izaya: simple, your my sister and no matter what you do I will always love and protect you, now please can we go home?
Me: o.....ok........
Me and izaya leave my hideout and I'm sad that I'm leaving this place that was my home for so long, I show izaya the burned down mansion then went to auntie and uncle's home and told them about how I have to leave and i hugged them both with tiers in my eyes and thanked them for everything they did for me,then I packed up my room (lasted a few hours), izaya said that I could keep Yumi, that made me happy, after saying goodbye to auntie and uncle and my friends, I put Yumi in a cat kennel and izaya told me that all my stuff will be delivered to his place, the boat ride was a few hours and Yumi hated it a lot, once in Ikebukuro I could smell the thick city air and izaya told me to stay close to him and I do until we got to his place, we walked all the way there..............I felt very tired and flopped onto the couch and izaya laughed, how could he be full of so much energy? He then showed me to my room, it looks almost the same as it was when I was little except cleaned up, I sighed and flopped onto my bed and went straight to sleep, i woke up the next day in my bed, it was so very soft, felt like i was on a cloud, there was a knock on the door and i groaned and got up