Most Straw Hats don't join the crew on their home island, and meet each others' families and friends from them.
Chopper, Vivi, and Jinbei being some of the exceptions. Even then, Chopper and Vivi's dads are dead, and Jinbei is the only one here where we don't know anything about their parents when we've been to their hometown (Chopper's parents were reindeer lol).
Jinbei, though, is an adult. Carrot is 15. SO, where are her parents? It always bugged me. Pedro seemed to be like a father figure and Wanda a sister-like figure to Carrot, but, no mention of her real parents. It's weird to me that it was never even brought up. If they had died during Jack's attack, it would be a big deal, right? So... WTF?
I think all Straw Hats (besides perhaps Brook) will have somewhat to very important parents.
Once I noticed how much Carrot's fighting style resembled Rokushiki techniques, and that Carrot and Stussy had a lot of design and clothing similaries, I wondered if Carrot could be her daughter.
It would be so fucking funny if it happened.