T.O.T.S.

• Pip (voiced by Jet Jurgensmeyer in Seasons 1-2 and Tucker Chandler in Season 3) is a young Adélie penguin who serves as Freddy's navigator and is the main protagonist of the series, along with Freddy. First mentioned in episode "Back to Cool", his birthplace is Iceberg Alley, home of Penn and his parents, and other penguins. His very known catchphrase is "This penguin's got a plan!" Jet Jurgensmeyer stopped voicing Pip after Season 2 due to experiencing puberty so Tucker Chandler took his place for Season 3.
• Freddy (voiced by Christian J. Simon[2]) a ordinary flamingo who is Pip's partner, and the one who does the flying. Freddy's also the main protagonist, along with Pip. Freddy has long wings that help him fly. His catchphrase is "Flamin-go!"
• Captain Candace Beakman (voiced by Vanessa Williams[2]) is the leader of T.O.T.S. and the mother of Mia the kitten. Her catchphrase is "Alright, Flyers. Let's get these tots to their moms and pops!". Beakman has a younger sister named Cora.
• K.C (voiced by Megan Hilty[2]) is a teenage koala who works at T.O.T.S. who tends to the infants in the nursery before they get delivered. K.C is also a guitarist. K.C has a brother, two sisters, a grandmother, and a surrogate uncle who is a cow. K.C affectionately calls the infants at T.O.T.S. as "Lil' Nuggets".

• Bodhi (voiced by Parvesh Cheena) is an insecure stork deliverer with the biggest wings at T.O.T.S. Bodhi tends to get spooked by mostly ordinary things, but is willing to help when assistance is needed.
• Ava (voiced by Melanie Minichino) is a street-talking female stork deliverer at T.O.T.S. Her catchphrase is "Rock On!"
• J.P. (voiced by Henri Lubatti) is a prideful stork deliverer at T.O.T.S. who speaks with a French accent. J.P is one of the finest deliverers at T.O.T.S. as J.P. won "Delivery Bird of the Month" ten consecutive times, thus Pip and Freddy see him as a role model. J.P. was also the company's fastest deliverer until J.P. was succeeded by Ava who in turn was succeeded by Bodhi. In the premiere episode of Season 2, Puppy Problems, J.P. becomes a father to a dachshund puppy named Lucky who is very mischievous, but J.P. fails to notice this. In the series finale episode of Season 3, Baby Fliers, he delivered Pip and Freddy when they were babies.
• Paulie (voiced by Dee Bradley Baker) is a parrot who is the air traffic controller at T.O.T.S. and often speaks his sentences twice.
• Mr. Woodbird (voiced by Eric Bauza) is a red-headed woodpecker who is the janitor at T.O.T.S. who sometimes gives Pip and Freddy ideas that are solutions to their problems.
• Mia (voiced by Charlie Townsend) a kitten who is the adopted daughter of Captain Beakman. Her catchphrase is "Mia help! Mia help!" when someone wants help with something, but even she needs help. In the episode "Lend Me Your Paw", Mia looks up to Pip and Freddy as her big brothers. Mia was the only baby whose name didn't start with the same letter as her animal species, until Lucky came along.
• Peggy (voiced by Angelica Hale) is a polar bear who wanted a better baby brother than her brother Paul until Peggy heard he got stuck in a small cave in the episode "Bringing Back Baby". She reappeared in the episode "Snow Place Like Home".
• Lucky (voiced by Alessandra Perez) is a dachshund puppy that loves to act mischievous and is the adopted son of J.P. In “All Aboard Babies,” Lucky's shown to love dancing and showing off his moves to other babies.
• Red, Jed, and Zed (voiced by Hadley Gannaway, Remy Edgerly, and Julian Edwards respectively) are the stork triplets who visit T.O.T.S. in the episode "Training Daze" and want to become junior fliers. They appear again having a hard time teaming up to deliver a baby moose in "Junior Junior Fliers".
• Cora (voiced by Yvette Nicole Brown) is Captain Beakman's sister and Mia's adoptive aunt, introduced in "The Ring Bear".
• Sam (voiced by Kevin Michael Richardson) is Cora's husband, whom she marries in "The Ring Bear".
• Ms. Trunklebee (voiced by Kari Wahlgren) is an Asian elephant who's a teacher at the Sky School. She has a tendency to easily forget things, such as her reading glasses.

Home media is distributed by Walt Disney Studios Home Entertainment.