Ernacht made sure his whole body was clean of blood splatters and the fishy smell. After soaking for a while, then he was sure his body was really clean. Then with his aura, he evaporated all the water droplets that were still attached to his body.
When he was still on the battlefield, every day, he came home covered in bloodstains. His sister would stand in front of the gates with a bright and relieved smile, waiting for him to come home. Unlike now, back then, he didn't suddenly become a Spearmaster. He had to slowly follow Lucifer's teachings, and in the end, managed to control his aura. That's why he didn't immediately become a mass killing machine like Lucifer.
