Yi Sun-sin

Pushed for turtle-ship construction and coastal naval defenses in the years before Japan's 1592 invasion of Korea, while much of the wider Joseon court remained unprepared for the threat.

Did not lose a single naval engagement across the seven-year Imjin War (1592–1598), commanding the Joseon navy against a much larger and better-resourced Japanese fleet.

At the 1597 Battle of Myeongnyang, defeated a Japanese fleet of more than 100 ships using as few as 12–13 remaining ships, exploiting the strait's narrow currents rather than confronting the fleet head-on.

This offers one example of the profile's very high resourcefulness score: making decisive use of severely limited material means rather than waiting for reinforcement that was not coming. Resourcefulness

Kept a war diary, the Nanjung Ilgi, in his own hand throughout the campaigns — a rare surviving first-person account for a military commander of this era, rather than a version reconstructed later by others.

Acted on his own tactical judgment against a specific court order he assessed as a trap, and was demoted, imprisoned, and tortured for it. His replacement lost most of the fleet soon after; Yi was reinstated with what remained and went on to win Myeongnyang.

This reflects the tension in the profile's dual-edged proactive_agency score: acting on his own tactical judgment against a direct court order carried a severe, immediate personal cost. The Myeongnyang victory that followed his reinstatement came from tactical skill with a nearly destroyed fleet, not from a further act of defiance — but it was the fleet's near-total loss under his replacement that ultimately vindicated the original judgment he had been punished for. Proactive Agency