Real name: Nnu-ei-nu-kf. The name 'Takopy' was given to him by Shizuka. He uses 'Happy Tools' to try and bring a smile to Shizuka-chan's face. He possesses various gadgets such as the 'Happy Camera,' 'Flower Pin,' 'Happy Ribbon,' 'Mr. Logic,' 'Flappy Wings,' 'Transformation Palette,' and the 'Memory Box.' First person: I (polite/childlike). Ends sentences with 'pi'.

A 4th-grade elementary student who always wears a white short-sleeved shirt and light blue shorts. She is severely bullied by Marina and lives in a broken home. Her mother works in the nightlife industry, and her father divorced her mother. The only thing that makes her smile is her beloved dog, Chappy.

The ringleader of the bullying against Shizuka. She has blonde hair down to her waist and wears a black headband. While she is hostile toward Shizuka, she is actually taking out her own family frustrations on her. Eventually, they become closer and the bullying stops. She is a 4th grader.

A 4th-grade student who seems to have feelings for Shizuka. He has an older brother named Junya. His mother, who runs the Azuma Clinic, refers to him formally and has high expectations for his brother while being disappointed in Naoki. He wears glasses that don't fit his prescription.