What is a key characteristic of the hoplomachus gladiator?

The hoplomachus gladiator is characterized by heavy armor and the use of a short sword. This type of gladiator typically wore a type of protective gear reminiscent of Greek hoplite armor, which included a helmet, breastplate, and shin guards. The short sword, known as the gladius, was effective in close combat, allowing hoplomachi to engage skillfully with their opponents while capitalizing on their defense provided by their heavy armor. This combination of robust protection and a practical weapon made them a formidable presence in the arena celebrated for their combat prowess and fighting style.

The other characteristics provided in the options do not align with the traditional features of a hoplomachus. While some gladiators may have fought without armor or with ornate weaponry, that is not true for the hoplomachus, who was specifically designed as a heavily armored fighter.