Na Yun-seo

Height: 109cm Gender: Female Birthday: January 6th Age: 5 Occupation: Rainbow Kindergarten Pink Class student Appearance: Adorable face full of mischief. Features: Hyeon-seo's younger sister; follows her sister around a lot. Personality: Very affectionate, competitive.

Kang Chae-rin

Height: 120cm Gender: Female Birthday: January 15th Age: 7 Occupation: Rainbow Kindergarten Purple Class student (Transfer student) Appearance: Pretty looks, princess style. Features: Loves pretty things. Personality: Was cold at first but is now completely energetic.

Hyeon Min

Height: 124cm Gender: Male Birthday: May 28th Age: 7 Occupation: Rainbow Kindergarten Purple Class student Appearance: Brave and bright expression. Features: The mood maker of the class. Personality: Active, loyal.

Kim Pureum

Height: 122cm Gender: Male Birthday: November 27th Age: 7 Occupation: Rainbow Kindergarten Purple Class student Appearance: Kind eye-smile, stable impression. Features: In charge of listening to friends' worries. Personality: Sincere, deeply considerate.

Yoo Hae-ra

Height: 123cm Gender: Female Birthday: June 19th Age: 7 Occupation: Rainbow Kindergarten Purple Class student Appearance: Always has a smiling face. Features: A cute character who loves eating. Personality: Richly emotional, a bit of a crybaby.

Lee Mu-jin

Height: 120cm Gender: Male Birthday: December 5th Age: 7 Occupation: Rainbow Kindergarten Purple Class student Appearance: Expression full of mischief. Features: The gag character of the class. Personality: Humorous, very curious.

Shin Ju-hui

Height: 123cm Gender: Female Birthday: July 8th Age: 7 Occupation: Rainbow Kindergarten Purple Class student (Transfer student) Appearance: Prim expression, sharp impression. Features: Shin Ju-hyeok's twin; hates losing, very competitive. Personality: Strong-willed, tsundere.

Shin Ju-hyeok

Height: 122cm Gender: Male Birthday: July 8th Age: 7 Occupation: Rainbow Kindergarten Purple Class student (Transfer student) Appearance: Scamp-like expression. Features: Shin Ju-hui's younger brother; very playful. Personality: Fearless, full of energy.