Jojo's Bizarre Adventure Jotaro x little sister reader

I Wanna Protect Too!

I woke up excited and ran out to Grandpa's room.
"Grandpa Grandpa Grandpa!" I burst into the room and tackle him awake.
"OH MY GOD! Huh? (Y/n) what is it?" He  picked me and held me in front of him.
"I met someone who knew Dio!"
His eyes widened "that's great who was it"
"Jonathan Joestar"
.
.
.
.
"WHHHHHAAAATTTTTT"
"Ow my ears"
"Sorry hun, but there's no way you could have met him he's your great great grandpa he passed away years ago"
"But that's who I met!" Grandpa stood up placing me down, "Well, I'll discuss it with Avdol but for now you should get ready for school" he ruffled my hair and sent me out of the room. I did as he said and got ready for school.
JoJo was already up and about to leave so I had to hurry. By the time I was done JoJo was ahead of me and, when I caught up to him, had already been surrounded by those girls he doesn't like! No not on my watch!
"Leave big brother alone! He's mine!!" I rush through the crowd hugging his leg and glaring at the girls.
...
"KYA! It's (n/n) (and for those whose nick name is also JoJo I present the name Little JoJo or Tiny JoJo maybe even smol JoJo :3)!"
"THATS SO CUTE I WISH MY LITTLE SISTER DID THAT!"
"FOLLOWING JOJO AGAIN! HE MUST BE GOOD WITH KIDS HOW MANLY!"

The girls all squealed at the sight of me and JoJo, who just sighed picked me up and continued his walk to school so the girls wouldn't follow him when he brought me to my school.
"You have to stop doing this, they get even worse when you're around" he scolded me.
"No! Cause if I'm here then you hold me and they can't touch you!" I pouted and buried my face in his shoulder, followed by more squeals from the girls.
He huffed. He knew there was no use to argue. He began his decent down the stairs. That is until this leg seemed to be cut by nothing.
"Wh-what!?" He started to fall down the stairs and quickly protected me by covering my head with hand. He managed to slow us down, using his stand to grab a branch but he would hit the stairs protecting me.
Again.
I'm going to get JoJo hurt because of me again?
No! I want to protect big brother too!
But there was no pain.
No big thud.
But everything looked....pink?
"(Y/n) are you the one doing this?"
I looked up at JoJo, we were in a pink bubble at the bottom of the stairs. JoJo's only injury being the cut on his leg that had cause him to fall in the first place.
Relief washed over me and my adrenaline rush had worn off.
"BIG BROTHER!" I cried into his chest and the bubble that had surrounded us faded away. He patted my back and let me cry. I had eventually fallen asleep from the adrenaline crash not even noticing the girls checking on us or the man approaching.
...
"A child? What's she doing in road?" I heard a voice ask and I was lifted into someone's arms.
"It can't be, (y/n)?" I finally opened my eyes to see a blonde haired man holding me. Next to him was a man in a checkered nat with a funny mustache and Grandpa Jonathan!
"Grandpa!" I yelled jumping into his arms and hugging him "I missed you!".
Both of the men looked confused and Jonathan was beyond startled.
"G-Grandpa? But I'm not even a father" he let me hug him and looked to the others for help but they were just as lost on what to do. I looked back at the other men and then at Jonathan.
"Oh right you're me Great Great Grandpa so I need to call you something different than Grandpa but Great Great Grandpa is so long" I pondered for a moment.
"Uh I don't believe that's what's bothering him" the Blonde man said but i had ended up ignoring.
"I know you are Grandpa Star!" I shouted happily and hugged Jonathan or Grandpa Blue again. They all just stared at me but Jonathan then smiled, "Alright Grandpa Star it is but I get to call you Little Miss" I smiled and nodded.
He placed me down and looked up at the two men Grandpa Star was with.
"Who are you?"
...
Cliffhanger mwahahahahaha! Sorry I've been gone I'm going to writing more often now feel free to message or comment questions you may have! Or suggestions! Bye!!!!