Captain: Bjorn (dad) is primarily responsible for the safety and operations of the ship. Although Sargo is Bjorn's first "big boat" captain appointment, we are lucky to have him and his life long sailing experience.
Quarter Master: Jayme (mom) has the hefty role of managing all of Sargo's crew members - and let's be honest that includes the Captain at times! As on a pirate ship, the quarter master is seen as the near equal to the ship's captain and as a general rule during times of battle the captain retained ultimate authority, but at all other times he and the crew were subject to the command of the quarter master.
Rigger: Alice (daughter) has the most enthusiasm of all crew members and is constantly asking to "go aloft" up the mast. She's the right crew member for the task since she has super human strength and a fearless disposition.
Powder Monkey: Toren (son) having the title powder monkey is way cooler than swab! It's hard to say at this point what roles Toren will have on Sargo's crew. He certainly has keen enthusiasm for tree climbing though. Although Sargo won't be needing a powder monkey to run gunpoweder, there were certainly be numerous tasks that will require Toren's "monkey" skills.