Celaeno is a harpy who was influenced by humans too much, her fashion sense became weird. Celaeno is easily spotted among her flock and she never once tried to conceal herself when out hunting. She is the youngest of three harpy sisters. The eldest sister is Aello and the middle is Ocypete.

Celaeno's name was taken from the Greek mythology of three harpy sisters. She is 139 cm tall and weighs 26 kg.