Rainbow is a supporting character in the Ingo series. She is a friend of Sapphire's and the possible love interest of Conor. Her parents are divorced; River is her little brother, and Patrick is her step-brother.
She has a timid personality but she is willing to stand up for her friend Sapphire in situations as shown when she was saving the dolphin stranded on the shores.
Rainbow is a girl around Sapphire's age. She is said to have fair hair.