Cleon is a mischievous fairy and is the servant/vassal of Madame Luna. Nicknamed the Fairy of the Night, she harbors a secret ambition to overthrow her master and become Queen of the Night (a title held by Madame Luna) herself. During the events of Puzzle Bobble 4, she steals the rainbow on orders of Madame Luna which prevents the morning from ever coming. After Madame Luna scatters the rainbow across the universe as individual coloured bubbles, Cleon decides to obtain them for herself in an attempt to gain power and betray her Queen and take over her position as ruler of the night.