Soldiers have a much more refined appearance than Shadows, appearing as a noble knight-type warrior at first glance. A closer examination reveals the Soldiers are just as beastly as the other Heartless. Their muscular forms are clad in a bluish-black body suit bearing the Heartless emblem and purple inverted emblems trimmed in gold on the knees.
They wear black, silver trimmed shoes that end in spiral toes, silver wristbands, and a silver knight's helm decorated with two angular, eye-like spirals on the front and a yellow stripe at the base of the curled silver plume. It's true Heartless behavior comes out on a close examination of their fierce blue and red-tipped claws, and their shadowed faces with bright yellow eyes and toothy maw.
Kingdom Hearts Final Mix Soldiers have their colors swapped with the Air Soldier, shading them in black, tan, and brown.
The Soldier's name references soldiers serving the military. This highlights the Heartless's battle capabilities. They also appear in large numbers, referencing an army.
The Soldiers often just dawdle around, but some run around. They are not speedy, and their HP is low, so they are very easy to defeat using physical attacks. Also using the Reaction CommandCyclone is an even quicker way to defeat Soldiers.