Tony

The teacher of Time. Appears as a blue clock. Capable of something like time travel. First person: I (formal) Male

Shrignold

The teacher of Love. Appears as a butterfly. Pretends to save those who are sad, but is actually trying to recruit them into a cult worshipping a King of Love named Malcolm. Apparently does not acknowledge same-sex love. First person: I (soft, polite) Male

Colin

The teacher of Digital. Appears as an old computer. A restless fellow who interrupts others while they are speaking. Absolutely hates being touched. First person: I (soft, polite) A total brat

Lamb Chop

The teacher of Food. Appears as someone in a lamb meat mascot suit. However, he claims vegetables aren't healthy because they turn your teeth gray. First person: I (formal) Male

Lamp

The teacher of Dreams. Appears as a blue lamp. However, he interferes with sleeping right before bed. Extremely loud. First person: I (soft, polite) Male

Yellow

One of the main characters. A yellow puppet with blue hair wearing overalls. The primary victim of the teachers. Shows honest reactions to the teachers appearing in each episode. Childish. First person: I (soft, polite)

Duck

One of the main characters. A green bird wearing brown clothes. Has high pride and makes remarks that seem to get to the heart of the matter. Often scolds Yellow, but is always easily swept up by the songs. First person: I (soft, polite)

Red

One of the main characters. Entirely red with a head covered in long yarn. Has a cynical personality and speaks in a detached tone. Even when a song starts, he isn't very enthusiastic and makes sarcastic remarks. Presumably an adult. First person: I (rough, casual)