I’m sure by now you’ve gathered that in this world I have changed unicorns to sorcerers, right? I thought it would be easier to explain than unicorn horns coming out of people’s foreheads. So the mark on her forehead is basically just a symbol that all unicorns are born with to show that they are magical. The pendant on the necklace is how they harness and control the magic within them, and they do cool spells and stuff with their hands. Pretty straight forward.