Let Ace and Luffy be feral jungle children. They grew up in a jungle let it show.
**Hunting and Foraging:** They should know how to hunt animals, catch fish, and forage for edible plants, nuts, and berries. They shouldn know how to make handmade weapons. 
**Communication:** Ace & Luffy’s communication might should be a little bit limited and more primal, relying on gestures, grunts, or simple vocalizations. Ace may know how to thank  someone but other than that he didn’t get out much. Neither did Luffy after he went with the bandit’s
**Camouflage and Stealth:** Ace and Luffy should excel at blending into their environment and moving silently, making them difficult to detect by others.
**Social Isolation:** Ace avoid contact with other pirates as he was used to living in the wilderness.
**Natural Instincts:** Ace & Luffy instincts for tracking, identifying edible and medicinal plants, and predicting weather patterns should be highly developed. Luffy always knows who he has to fight. 
**Animal Companionship:** Ace has a deep connection with his cat Kotatsu . And Luffy should have really kept us the three headed dog. 
**Physical Fitness:** both ace and Luffy have an excellent physical condition, with strong muscles, endurance, and agility due to their demanding lifestyle.