More on my Straw Hat Kids, mostly on the crew as a whole:
•at first, Cleo has a massive crush on Luffy. It makes him a little uncomfortable, but eventually it settles down and she just views him as her weird uncle. It seems most of that energy goes to turning Ruby into her personal baby doll.
•Shark is the responsible one of the older kids. Cleo and Thomsaine are about as feral as the younger kids. He's particularly close to Jakob because of this.
•Jakob is the only one of them with any survival instant, but because he's the youngest, most of the other kids just tease him as a crybaby. 9/10 he was right.
•Ruby is obsessed with Sea Beasts and Kings of all varieties. She likes to play a game with Luffy and Zoro to see if she can guess where one will pop up and they'll attack it.
•Sanji tried to dress Sora up in cute matching dresses with Kuina but hers always come back stained and ripped.
•Shark and Thomsaine start a book club. The other kids aren't interested, but Robin, Usopp and Jinbei are happy to participate.
•Yaz is the little shipwright's apprentice. She's always trailing after Franky and Usopp as they make their repairs.
•Chopper becomes a freak about stocking contraceptives after dealing with back to back unplanned pregnancies of Luffy/Nami and Zoro/Sanji. He's had enough of the miracle of life, thank you. Please stop making him deliver babies, he's much more comfortable with mortal injuries.
•Ruby and Sora are the first to get bounties, something that lands both Luffy and Zoro in the doghouse for weeks.
•Most of Kuina's frilly dresses come from Reiju. She and Zoro have an understanding that he'll kill Judge on sight if he ever comes near the twins. Sanji knows about this, despite both of them thinking he doesn't.
•Zoro nearly killed Sanji when he revealed he was a quadruplet after Zoro was already pregnant. They were both very relieved to only have two.
•Nami and Luffy refuse to define their relationship beyond navigator and captain, so the rest of the crew just starts referring to them as the other's "co-parent". They accept this with mild grumbling.
•Ruby refuses to sleep in a crib for the first six months of her life. Zoro says it's because Luffy spoiled her, and Luffy doesn't understand how you spoil a baby. Zoro really has egg on his face when the twins are born and he's as bad as Luffy with always carrying his babies around.
•Franky/Robin met and adopted Thomsaine during the months Nami was recovering from having Ruby with the Revs.
•Dragon and Luffy have zero idea how to communicate with each other, so they mostly just discuss Thomsaine and Ruby when they see each other. Iva always gives him a hard time about being a Grandpa whenever Sabo comes back from a visit with Luffy.
•The age order is Shark and Cleo, who I assume to be about 11 or 12 in Canon? Then Thomsaine is about 3 years younger. Ruby, Yaz, and the twins are all a few months apart, all 6-7 years younger than Thomsaine. And then Jakob is the youngest, two years younger than the middle cohort. Ruby and the twins were born and raised on the Sunny, and it's pretty evident they've only known a life of piracy.