The moment after the child in green left the soldier alone, he falls limp. What he said seemed very important, and he had the look of a job well done. At least the Soldier got his final message to the boy in green...

You quickly approached the Soldier as soon as the boy in green left, checking on the fallen Soldier. He was badly injured from his fight to hold Ganondorf back, as Princess Zelda left with Impa, and would most likely not survive if he's left alone.

You take the Soldier into your home, laying him on your bed so that he can breathe better...