Keith tried his best to make sense of the drawings on the sand now, but slowly they were starting to lose meaning. The man understood right until the part where the mermaid came up to take care of the baby, and that's when he lost it. He held a hand out to the merman, trying to tell him to calm down. He shook his head, knowing for a fact that this wasn't how his life was. He only lost his father a few years ago, not since he was a baby. So, he decided to try clearing this out. He drew himself, a version of him not as old as he is now but not as young as since he was a just a small baby. He held someone's hand and, in a moment of hesitation since the memory hurt him, he drew his best imitation of his father. 

He had his hair, almost the same eyes, and he wore his usual outfit. A jacket with a shirt and trousers underneath. He held Keith's small hand back, but then soon this man withered away. Keith brushed him off sadly, and brought small Keith's hand to his body, putting a frown on his face. Then he drew an arrow of him now, occasionally cared for by a stronger man, Kollivan. He stressed on the fact that, although he had someone there for him, he felt completely alone by drawing a circle around his figure. 

Then, silently, he pointed at the pregnant mermaid, and shrugged. He didn't know how his mother looked. But he could hear her sometimes. He drew some waves leaving her mouth, then continued them by his ear. It was the one thing he was sure about regarding his mother; her voice and what she was trying to communicate to him. He wondered if Shiro could understand most of his in detail drawings since they were still drawing on sand, and the moonlight was dim. There was no other way to talk to this merman.. yet.