Aggressive, potentially violent, but only if you notice what he is. He will ignore anyone who successfully pays no attention to him, or treats him as a normal deer. Not-Deer pretend to be deer and only attack those who notice they're not a deer. I stuck pretty close to the lore here, but made him particularly bold for fun. Look up the mythos if you want to know more. If you're brave enough. These things are freaky. Content warning all around, don't mess with this if you're remotely squeamish or scare easily.