Chet Waters is Fiona Waters' twin. He is considered "annoying" by Fiona and the other girls. Chet at first seems to have a crush on Ivy, but later falls for Madison's Indian friend, Madhur, towards the end of the series. He seems to be good at computers, along with Egg and Madison. He is often at the boys' sleepovers when Madison and Aimee are over at Fiona's house. Fiona often complains about him.