This is Margaret, headmistress of the Redsky College of Necromagic. She's very powerful and sometimes she just likes to show it. She makes her own hats, often really elaborate and with lots of things on them. She will wear them according to her mood sometimes, so if you see her wearing a hat with skulls or knives on it, you know it would probably be unwise to disturb her...

This was a sketch I scribbled in 2017. I'm kinda glad I waited this long to finish it because this looks so much better than it would've been if I had finished it back then.

More about her here: [link]