Batfamily x sister reader

Brotherly Love

You are 5 in this story
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(Y/n) had a diary in which she wrote down her secrets. And one of them is her favorite sibling. Jason wanted to know who it was. Jason knows he's never been around lately and he knows he's definitely not her favorite.
' It's probably Dick. He's everyone's favorite.' He thought
Once she left her room to the living room to watch Home Alone with Dick, Jason made a move to her room. He looked at her bed and there it was. Jason grabbed it and took it to his room. He read though the pages until he found what he wanted. In the paper, it said, ' I have four brothers. And I love them all very much, but out of those four I have a favorite. Damian is always with Dick and never lets me have him to myself. Me and dick still watch movies that Damian hates and I get him. Damian just tells me to go away. Tim is always busy with his dumb homework but still does cool things with some liquid with me. Jason is never home and when he is, he always plays tea party with me. I think it's because he's sad that I don't get to see him a lot.'
Jason kinda felt bad. He did always guilty that his sister can't see him because of his other persona. And he did always agree to play with her since he never sees Tim do anything with her that doesn't involve science. Dick is always with Damian. He continued reading.
' My favorite brother is Jason. He is always with me when I need him and always plays with me.'
Jason shed a tear. He didn't know how much he meant to this little girl. Jason closed the book and took it back to her room.

Time skip

It's been an hour since you finished your movie with Dick and was drawing. Bruce has to leave for a meeting and Alfred has to get groceries. Dick left to Mount. Justice with Tim.so it was just Damian, Jason and (Y/n) alone in the manor. She loves drawing even if her drawings come out as blobs. She was drawing another blob when Damian walked in.
" -Tt, (L/n), what are you doing. You're making a mess."
You looked up and noticed all your crayons, markers, and colour pencils were all over the floor.
" Sorry."
" *sighs* It's fine. I'll help you clean up."
You smiled and cleaned up. Damian went to pick up the markers when he noticed that these weren't normal Crayola markers. They were his Copic markers.
" WHERE DID YOU GET THESE!"
" From your room."
" YOU DON'T GET THINGS THAT AREN'T YOURS."
" I'm sorry Damian. I just wanted to draw like you-"
" No, you will never draw like me."
" Yes I can-"
" NO YOU CAN'T. ALL YOU DRAW ARE SHITTY ASS BLOBS."
She started crying. Damian felt guilty but was still mad at her. He checked his markers and realized that some didn't have the lid and others were dried. This broke him.
" SEE WHAT YOU DID. NOW MY MARKERS DON'T WORK."
" I-I'm so-sorry Dami-Damian."
" You'll pay for this."
You started wailing. Damian got annoyed. He walked up to her but she screamed and ran away.
" COME BACK HERE YOU LITTLE SHIT."

Jason was left in charge of the youngest Waynes. He was on his phone when he heard Damian yelling. He shrugged. Damian continued to yell. Jason got pissed and got up. As he walked to his door to yell at Damian, he heard (Y/n) wailing and then Damian chasing her. Jason quickly ran out and looked for them. He was gonna look for them in the living room when he heard a crash in the kitchen. He ran into the kitchen and (Y/n) ran to him crying.
" (Y/n)! Are you ok."
" I'm fine Jay. But Dami's not."
Jason followed the little girl into the back room where they kept all the knives hidden from her. Jason could hear someone's low breathing and groaning. He turned the corner to find Damian laying on a bunch of knives. On was stabbed into him.
" Ok, what happened here."
" (Y/n) took my markers so...I yelled at her.... She cried and ran away....I didn't get to finish....my sentence so I ran...after her...So she ran into...the kitchen, and ran though where....all the knives are....She dropped all of them and I was the one....they all will fall on. So they all fell....on me and one managed to stab....me since I slipped on...another knife on....the floor."
" Ok, then. I'll just take (Y/n) to bed and come back for you." Jason was about to leave when Damian called out for him.
" Wait, Todd....I'm gonna die....if you don't help....me now...I'm los..ing a lot....of blo-blood."
As much as Jason hated Damian, when he saw his face, it made him wanna cry.
" Okay, okay. Umm, (Y/n) go to your room, okay."
(Y/n) nodded and left running.
" Okay, now you."
Jason walked over to him and picked him up. He then walked to the grandfather clock and down to the Batcave. He took him too the medical room and placed him on the table.
" Okay, let me find blood."
Jason went off in to the room and searched for anything that looked like blood. He found a cold room and walked in to find blood.  He found a bag with ' Damian' on it. He took it and ran back to Damian. ' What am I thinking. I can't help him. I don't know how' Jason thought as he needed to remove the knife.
" Just pulled it OUT."
" Okay"
Jason pulled out the knife while Damian yelled in pain. Jason watched as Damian tried to hold in the pain. Jason left bad. Kinda.
" What are you waiting for Todd. Stitch me up."
Jason nodded. He grabbed to materials he needs and went back to Damian.
When Jason left, Damian shed a tear. He's been hurt before. But this was new. He's never been stabbed by accident. This was new. Jason didn't know what he was doing. And it hurt more then usual. Jason came back to see Damian wipe a tear away fast. Jason walked over to him.
" Hey, it's okay. I'm trying to help you."
Damian just nodded. Jason grabbed the needle and placed to thread inside the loop. He slowly walked to Damian.
" Okay, this might hurt a bit."
Damian nodded. Jason slowly went to stitch him. Jason stopped when ever Damian yelped in pain. Soon he had finished and bandaged him up.
" Thank you, Todd, for helping me."
" Anytime, demon-brat."
Jason was about to go upstairs when he felt someone hug him. He looked down to see Damian hugging him. Jason smiled. Now he knows why Dick's obsess with him. He picked up Damian and walked back up to the manor.