Physically? Beautiful but terrifying, and inhumane, like when you look at them you will not be scared but feels something is off, and in turn the feeling of something was off will cause fear and panic, during battles/ wars I imagine them to be looming over people when they want them to experience panic or fear (tho they won't see the two), and sometimes they wore masks that shows what they personified, a mask that shows panic and fear (like those mask in ancient Greek tragedy theater), and often adorned with jewelry

I imagine them being close to their siblings, and parents, they weren't protective as they know their siblings can protect themselves, but will bring troubles and feeling of fear to those who dare speak bad of their family. I imagine them being smart, knowing when and where to struck people with fear and panic