- Voiced by: Michaela Luci (English)
A little girl with the power to use wishes from the Wishing Tree.
- Color Failure: Not like she had a choice, but in "Cosmic Sneeze", the Wachoogieboogies temporarily turned her hair from blue to pink.
- Curtains Match the Windows: Has blue eyes and blue hair.
- Dub Name Change: Vera in the Spanish dub.
- Genki Girl: Her defining trait.
- Girlish Pigtails: Her standard hairstyle.
- Hair Decorations: Wears a headband with a bow.
- Innocent Blue Eyes: To match her blue hair.
- Nice Girl: Her defining trait.
- Pink Means Feminine: Wears a magenta skirt and leggings.
- Skirt over Slacks: She wears a magenta skirt over matching leggings.
- True Blue Femininity (snicker): Has blue hair.
- Voiced by: Jamie Watson (English)
True's cat companion.
- Cat Ninja: "The Kittynati" focused on him training to become a ninja.
- Cats Are Snarkers/Deadpan Snarker: His defining trait.
- Color Failure: Not like he had a choice, but in "Cosmic Sneeze", the Wachoogieboogies temporarily turned him green.
- Innocent Blue Eyes: To match True's.
- Trademark Favorite Food: Fishy poof crackers.
- You Gotta Have Blue Hair: He has indigo fur.
- Voiced by: Dante Zee (Seasons 1-2), Nicolas Aqui (Season 3)
The Rainbow King's apprentice and keeper of the Wishes.
- Color Failure: Not like he had a choice, but in "Cosmic Sneeze", the Wachoogieboogies turned him all kinds of colors. First he turned completely chartreuse, then his hair turned purple and teal, then his skin turned white with rainbow spots, then his entire body turned gray.
- Curtains Match the Windows: Has purple hair and purple eyes.
- Mellow Fellow: His defining trait.
- O.O.C. Is Serious Business: You know the Wachoogieboogies are a serious illness when their side effects cause Zee to freak out.
- You Gotta Have Blue Hair: Has purple hair.
- Youthful Freckles: Has these.
- Voiced by: Anna Claire Bartlam
The (supposed) princess of the Rainbow Kingdom.
- Cool Crown: Hers appears to be made out of translucent crystal.
- Curtains Match the Windows: Has golden hair and eyes.
- Everything's Better with Princesses: Well duh.
- Primary-Color Champion: Has blonde (yellow) hair, a red dress, and blue (albeit very light) accesories (crown, shoes).
- Proper Tights with a Skirt: She wears white tights.
- Royal Brat: Mostly. However, she usually pulls through.
The Rainbow King
- Voiced by: Eric Peterson
The ruler of the Rainbow Kingdom.
- Black Bead Eyes: Has these, in contrast of True, Bartleby, Zee, and Grizelda, who all have big eyes with colored irises.
- Magic Staff: Magic Scepter.
- Primary-Color Champion: He's white, red, blue, and yellow.
- Ridiculously Cute Critter: Anyone who's seen him would agree.
- Royals Who Actually Do Something: He is a competent leader, and the Rainbow Kingdom couldn't ask for a better king.
- Unusual Euphemism: All of his exclamations, which all involve color (well, it is the Rainbow Kingdom).