Hey you said previously you don't often do x reader stuff so delete this please if not suitable
You know how Byakuya adopted Senku? What if he adopted another kid (because Byakuya absolutely would I love him) and now he is a father of two? Mainly about Byakuya but include Senku if ya like
Dr. Stone Headcanons: Ishigami Family Edition!
[for the reader/reader indulgent] (ahem, this is written by an only child who isn't adopted so like trying my best)
Byakuya would've adopted you a few years after adopting Senku (around 5 or 6 years old)
He would try his best to spoil both of you; if Senku's really into science but you're into another interest, he'll try his best to fund the both of them
Senku doesn't really take on a brotherly role but more of a "you're my lab partner" and spends most of his time with you while conducting science experiments
Byakuya has had to stop you and Senku from starting a fire in the living room many times because you may have accidentally set off one of your "fake" mini rockets
Senku borrows some of your stuff to use for science, Byakuya has to scold him for taking your stuff without permission
Byakuya most likely lived in a two bedroom apartment, so you and Senku would have to share a bedroom in your early childhood
Once Byakuya could afford it/after he got his job at NASA, y'all moved into a three bedroom apartment and you were so happy to not share a room where your brother is up at ungodly hours researching
Byakuya has family game nights every week
He brags about both of his kids to everyone he can talk to. You get a B on your math test? He will gloat about how well you're doing and praise you for trying your best. You and Senku both get an A on a science quiz? An excuse for a pizza party and gushing about how smart you two are to his co-workers
Byakuya knows that Senku is just a really smart kid and doesn't want to make competition between you two
Byakuya would always be willing to pay a little extra money to make the two of you happy
He would take you and Senku across the world anytime he could. Eventually, he trusted Senku and you to just visit him in America when you needed him. Senku would just visit for the money but you would make time to actually hang out with Byakuya
