There were bushes all around the clearing where they landed, so it wasn't possible to see all of them,
at the moment the elf tried to hide, Shar was standing with his back to the elf, his attention was concentrated oh death and his siblings, so he couldn't see her, but he surely did hear her, therefore his reaction.
"You too, there on the tree, I can both smell you and hear you, you might as well come down and introduce yourself!" he said to Runa.
At this point Shar was already far from looking human, he was over 2 meters (6.5 feet) tall, his shoulders was as broad as the shoulders of a male bull, his skull became more bull like, with long face and thick bone under the skin, his teeth became sharp like minotaur's teeth should be and he started to grow horns. His body became very muscular, more muscular then any human can ever be and he started to grow fur. His feet still remained human and not hoofs, but were larger then before. His senses were fully developed minotaur senses at this point, he could smell anything from a long distance, had an acute hearing and infra- vision, he was not aware of the last one though because it was day time, Shar also developed an instinctive navigation ability and understood that they are standing facing South, the elf is North to him, death and his siblings are to the South and the creature on the tree is to the South - West.
When the new girl arrived from the east, Shar noticed her by the new smell before she appeared, but she smelled like a human, and even more then that, she smelled like a young female, so Shar didn't feel threatened by her, "I'm Shar" he introduced himself swiftly to the newcomer without turning his head.