OC

Bucky introduces his autistic younger sister y/n to the team y/n had been living with bucky for a while, creating a routine with him Y/n enjoyed it, it was quiet, mostly, except the nights where bucky woke up screaming from his nightmares but other than that, it was quiet She knew her brother cared for her, a lot infact, enough to indulge her fixations And now, bucky is introducing her to the team which are known to be loud, bucky planned this a week in advance to give y/n time to adjust to the change in routine