12 x reader (Terror in resonance )

You are 9's little sister, 8 , it's been 12 years since you've seen both 9 and 12, you were left behind with 5 so you went through everything with her and survived the drugs they put in you two. while living with 5 she told you how you big brother and 12 never really wanted to save us, all this time has made you think differently about them...but what if they havent felt differently for you.