gear-headed siblings

what if the arcs abandoned Jaune but afterward he was adopted by Pietro polendina before Penny was created, and what if Jaune being the older sibling decided to train to protect penny at all costs(in this AU Penny will act more human due to being around Jaune a lot therefore she knows sarcasm she knows what is and is not polite and she knows how to curse however does not do it in front of Jaune)