Alastor Moody (3)
Moody first came to the hospital area to deliver Gwen in hopes that they could do anything to help her. When he later returned after Dumbledore and Grindelwald's duel, with Professor Viridian in tow, he learned that she had died even before he had entered the hospital. He was convinced to have himself looked at and his wounds were healed -- he left shortly afterward, still sore, but he didn't really care.