She has medium length blue hair, with silver tips and streaks.

Ari has reddish-brown hair, is 6’2, he became an executioner straight out of high school and built quite a name for himself for being cruel and inhumane. He quickly rose to the top rank

Heidi’s morals aren’t that far from Ari’s, everyone on mars is brainwashed into thinking that being an executioner is cool because you get to protect mars and instill justice. Killing criminals is justice on mars. She’s shocked about how he changed.