Myrtle? Suddenly the girl became very familiar, and Ron nodded his head slowly as he began to understand who she was. Moaning Myrtle, he thought to himself. She looked just like he remembered her. Only fleshier. Well, and maybe a tiny bit younger, too. He watched her quietly for a few seconds, noting that she had her hand on her wand and so Ron put his hands in the air to show he meant no harm.
"Unfortunately," Ron began, feeling awful for everything he knew about her. It almost seemed completely unfair right now, but he began to lower his hands. "I'm going to reach for my wand, Myrtle. It's cold out, and we don't want you catching a cold, okay?"
He waited a few seconds, mostly to see what she would do. The wand was in Ron's trouser pocket and he pulled it out, casting a gentle warming charm around the small girl. Once that was done, Ron pocketed his wand again plopped himself down on the grass cross legged. It was his way of showing her he wasn't a threat, it had been part of his Auror training, and yes, he had paid attention.