Bonney's DF revolves around age manipulation. I believe this is how the revolutionaries were able to save Kuma.
This is how I think bonney might be able to use her powers. So long as a person isn't resisting her powers with haki, Bonney should be able to revert a person to a fetus- to a point where they were only a clump of cells. By then re-aging them, bonney would then be able to heal their injuries. Bonney would revert the development of a person's body, and then force the body to re-develop and in doing so heal injuries. idk if this makes any sense, but I feel like its the most logical way Kuma could be healed.
I also think that its one of the only ways Bonney's fruit could be strong but not broken. She might not be a strong fighter, but if she has insane regenerative powers, she could still be dangerous.
This is how I think bonney might be able to use her powers. So long as a person isn't resisting her powers with haki, Bonney should be able to revert a person to a fetus- to a point where they were only a clump of cells. By then re-aging them, bonney would then be able to heal their injuries. Bonney would revert the development of a person's body, and then force the body to re-develop and in doing so heal injuries. idk if this makes any sense, but I feel like its the most logical way Kuma could be healed.
I also think that its one of the only ways Bonney's fruit could be strong but not broken. She might not be a strong fighter, but if she has insane regenerative powers, she could still be dangerous.