Blue (vocal effects by Traci Paige Johnson)[4][5] – A blue puppy who leaves pawprints on objects (and occasionally characters) as clues to what she wants to do.
Josh (portrayed by Josh Dela Cruz)[4][5] – The host of the series. He is a cousin of Steve and Joe from the original series.[6]
Mailbox (voiced by Doug Murray)[5] – A mailbox who delivers a letter or e-mail to Josh every day.
Sidetable Drawer (voiced by Liyou Abere in season one, Shazdeh Kapadia from seasons two to four, and Skywalker Hughes in season five)[4] – The keeper of the Handy Dandy Notebook, who lives in the living room.
Mr. Salt (voiced by Brad Adamson from seasons one to four and Nick Balaban in Blue's Big City Adventure and season five) and Ms. Pepper (voiced by Gisele Rousseau)[5] – A married couple of condiment dispensers who live in the kitchen.
Paprika (voiced by Shechinah Mpumlwana in season one, Abigail Nicholson in seasons two and three, and Abigail Oliver in seasons four and five)[5] – Mr. Salt and Mrs. Pepper's eldest child. She carries a smartphone made from a graham cracker.
Cinnamon (voiced by Jaiden Cannatelli in season one, Niko Ceci from seasons two to four, and Jayd Deroché in season five)[5] – A cinnamon shaker who is Paprika's younger brother. He wears a baseball cap.
Sage and Ginger – Paprika and Cinnamon's 1-year-old youngest brother and sister.
Shovel (voiced by Leo Orgil from seasons one to three, Nathan Sayavong in season four and Luke Dietz in season five) and Pail (voiced by Jordana Blake from seasons one to three and Michela Luci in seasons four and five) – A brother and sister who live in the backyard.
Tickety Tock (voiced by Ava Augustin from seasons one to four and Maja Vujicic in season five)[5] – An alarm clock who wakes the residents of the Blue's Clues House each morning.
Slippery Soap (voiced by Jacob Soley from seasons one to four and Lexi Perri in season five)[5] – A bar of soap who lives in the bathroom sink. He slides around everywhere he goes.