It's okay we love your cast's gay.

In this instance, the wish would be taken as literally as possible. Damen the person Laurent wished to protect would receive a charm with no instructions- though if they wished to test it out, they'd find he wouldn't take damage from any strike done to him.

That being said, the charm itself can only take so many strikes for him. After three hits, the charm will crumble entirely, and Damen Laurent's special person would once again be vulnerable to attack.