Emily promised not to tell and then helped her clean up her magic circle so she could start over again. Hermione decided to keep the Magical Circle of King Solomon with the snake, to stand in to keep herself safe in case she made a mistake and the demon was a mean one. She redrew her second diagram too - the green Magical Triangle of Containment with a small circle drawn inside it to summon the demon into. She carefully coloured in the space around the snake yellow on her large circle, then she drew a red square in the centre to stand in and wrote "Friend" inside it. It seemed nicer than "Master", since she didn’t want a slave. Slavery was wrong, everyone knew that.