Helmeppo, once an arrogant and spoiled son of Captain Morgan, undergoes significant character development throughout One Piece. Initially a cowardly antagonist, Helmeppo becomes a determined and loyal Marine under the mentorship of Vice Admiral Garp.

After Luffy and Zoro’s actions expose his father’s tyranny, Helmeppo decides to change his ways. Training alongside Coby, he transforms into a capable swordsman and Marine officer. His journey from a selfish brat to a responsible individual highlights his resilience and determination to prove his worth.

Helmeppo’s character demonstrates the potential for personal growth and redemption, proving that one’s past does not define their future.