Batfamily X Child reader

hey ... its me

Jason pov:

I looked at the cave entrance there was a loud bang down there.

I started walking towards it but than I heard loud stomps. Bruce did as well.
"Jason step away" he told me.

I slowly walked backwards. Tim was still bleeding. Damian not giving a fuck. Bruce walking In front of me.

The clock slid open. And a girl with h/l h/c hair. It was h/st (style) and the girl had e/c eyes.

"Hey..."she said.

Bruce gave her the bat glare.
"You can't give me the bat glare dad..haha" she laughed.

My eyes widen, dick dropped his phone.
" I am sorry what did you say"?Tim asked.

She looked at Tim. "Timmy"? She asked.
"Don't call me that.."he said.
"Why"? She asked.
"I only let one person call me that. " Tim repsoned.
" I know.. Me"she said.

"No.. Its actually my baby sister" Tim told her.
She only smiled.
She looked really simular to y/n... But no. No it can't ... How???

"L/n" she told us.
"What"? Damian asked.
"L/n my name." she said.
"Last that is right"? Dick questioned.
"You would be correct" she responded.

"First"? I asked.
"A secret" she mumbled.
"Name"? Bruce asked.
Once again she only smiled.

Her smile was very big.... She looked to have scars all over her cheeks.
They looked to be sewn shut from where I stood.

"I came to tell you something important ..." she said.
We all looked at her with see If expressions over our faces.

"What...would that be"? Damian asked.
"What ever you do . don't let y/n know what the superhero life... And or let her be out with the joker and or Harley Quinn. " she said.

" I am afraid all of that has happened miss..." Alfred said as he came in with hot chocolate.

He handed l/n a cup.
She took it from his hands.
"Why thank you Alfred . your famous hot chocolate always made my days even the worse of them...." the girl said.

"What are you talking about"? Dick asked.
"Alfred's hot chocolate"? She more questioned than said.
"I know that.. But... Nevermind" he said.

Bruce looked at the girl complete silent. He was mind bungled.

"Bruce"? I asked.  He shook his head and than looked at the girl once again.
"Did you say your last name was l/n"? Brice asked the girl.

"Why yes..." she said than smiled. Something about that smile was way off.