Batman may have a full roster of crime-fighting children, but his bond with Nightwing, his first Robin, is in a league of its own. Their unmatched connection doesn’t just define them as the heart of the Bat-Family—it elevates them as the greatest father-son duo in all of DC Comics.

There’s always something uniquely special about your first—whether it’s your first love, first car, or even your first job. The same holds true for parents with their firstborn. Firstborns are often the family’s guinea pigs, the test-run kids who bear the brunt of their parents’ learning curve. As they grow older, many can look back and recognize that, their parents had absolutely no idea what they were doing.

Yet, it’s precisely this trial-and-error experience that creates a bond like no other. As Bruce’s first Robin and the first child he took under his wing,...