A dog with a clock for a body, Tock is Milo’s sensible and time-conscious companion on his adventures.

A well-dressed beetle who travels with Milo and Tock, often providing comic relief with his exaggerated tales and cowardly nature.

The ruler of Dictionopolis and a lover of words, who aids Milo in his quest and represents one side of a sibling rivalry over words and numbers.

The ruler of Digitopolis and a champion of numbers, who shows Milo the wonders of mathematics.

The princesses who embody balance and wisdom within the kingdom, known for their fair and reasonable nature.

A boy who floats at the height he will be when fully grown, teaching Milo about perspective and different viewpoints.

A group of officials in Dictionopolis, each responsible for a different aspect of word production and usage.

An indecisive figure in the Lands Beyond, known for his uncertainty about the weather and choices.

Inhabitants of the Doldrums, focused on idleness and lack of thought, which Milo encounters early in his adventure.

A large insect with a talent for spelling, who takes great pride in this ability and often argues with the Humbug.

A resident of Digitopolis with a twelve-sided head, who reveals the importance of different mathematical perspectives.

A former caretaker of language in Dictionopolis, imprisoned for being overly restrictive with word use.

A doctor specializing in noise, who provides a humorous commentary on society's preoccupation with loudness.

The overseer of sounds in the Valley of Sound, who grapples with the balance between silence and noise.

The conductor of an orchestra that controls the colors of the world, inadvertently giving Milo an unusual experience in managing colors.

Inhabitants of the Mountains of Ignorance, each representing different challenges and weaknesses of thought that Milo must overcome.

A character who represents a mathematically average family in Digitopolis and challenges conventional perceptions of normalcy.