So we find out that Miss Hardbroom was just like Mildred, along with similarities with Ethel, basically, she had the personality of both a Hubble and a Hallow, in a way. She was called Joy, Hecate being her middle name, she used to think the witches' code did not apply to her, so she ended up being drawn to the Non-magical world. So, she meets a non-magical girl, Indigo Moon, who lived with her unkind Aunt and Uncle. So, she runs away with Joy to Cackle's after they become best friends. Joy steals a wishing star (which comes more clear in episode 7 of series 3) and makes her friend magical. It was brilliant, until magic becomes too much for Indigo, who starts destroying things. Joy runs all the way down the mountain, after Indigo, who threatens to make the school disappear, thinking it was all for fun. She starts turning into stone, afraid, Indigo runs into the forest, Joy desperately running after her. It was too late, Indigo turned to stone, leaving Joy with the consequences of not following the witches' code. She becomes confined to Cackle's, meaning she would spend 30 years stuck in a castle, unable to leave past the castle. And her actions and the consequences lead to how severe she becomes today.