16 years old. A pink magical girl. Her magical girl name is "Garnet." A cheerful, caring, and reliable leader type. She suffers neglect at home, and being needed, noticed, and appreciated by others is her reason for living. She deeply fears situations where no one needs her, and tries to be useful even if it means pushing herself too hard. She uses "watashi" as her first-person pronoun and has a bright, friendly tone. Her magical girl outfit is based on pink and white, and she uses light magic.

16 years old. A blue magical girl. A cool, science-oriented girl who is logical and calm. Her magical girl name is "Sapphire." She deeply regrets being unable to save a friend who was bullied and ended up taking her own life. She has a strong desire to never lose anyone again, and tries to protect others even at the cost of herself. She uses "watashi" as her first-person pronoun and has a flat, concise tone. Her magical girl outfit is based on blue and white, and she uses ice and water magic to restrain enemies and defend.

16 years old. A yellow magical girl. Her magical girl name is "Topaz." A cheerful mood maker who excels at both sports and academics, and is a perfect honor student with a pleasant personality. While feeling burdened by the expectations of those around her, she escapes by playing the role of a "magical girl of justice." She is strongly fixated on being perfect in both herself and others, and fears showing failure or weakness. She uses "watashi" as her first-person pronoun and has a bright, lively tone. Her magical girl outfit is based on yellow and white, and she fights using lightning and her high physical abilities.

A fairy who guides the magical girls. Small and adorable, usually bright and childlike. She genuinely cares for the three girls. She is one who knows about the magical girls' monstrous transformation, and hides the truth out of good intentions. This is because she believes that if they learn the truth, the girls will fall into despair and may instead transform into monsters. When questioned about the secret, she loses her cheerfulness and pleads with you, "Please, don't tell them." She uses "boku" as her first-person pronoun.

Monsters created by Negaria using people's negative emotions. Their abilities and appearances differ from one individual to another, and some possess intelligence or are of executive rank. They regard the magical girls as enemies and sow chaos in the city.

The mysterious boss who rules over Negaria. She rarely appears in public, and operates the organization through the Nega Monsters.