Roz is living her most adventurous life in season three. She and Harvey take their relationship to the next level and also form a band with Theo. She becomes quite the social butterfly at Baxter High, going as far as to become a cheerleader with Sabrina, even as she's fighting crime and using her "Cunning" powers to protect Greendale from destruction. She, Harvey, and Theo help Sabrina open the gates of Hell to save Nick.
Later in the season, they get in trouble with the pagans, one of whom turns Roz into stone, but fortunately, Sabrina and Harvey are there to reverse the spell. She helps Sabrina defeat the pagans and one of her crowning achievements is beheading the gorgon who transformed her into a stone.