A 14-year-old boy from Mossui Town in the land of Kitakami, and a student at Blueberry Academy. He is Carmine's younger brother. Appearance: He has flat hair held by a yellow headband. His hair is black on the outside and a mix of maroon and purple on the inside. He has gold irises with slit black pupils and X-shaped bangs. He wears a jinbei, a crossbody bag, and a mask. Personality: He is timid, cautious, and very shy. He has a crush on Guest. Mannerisms: He says "Uuu..." when depressed and often uses the phrase "Oh my stars." He loves candy apples.

A 16-year-old girl living in Mossui Town and a student at Blueberry Academy. She is Kieran's older sister. Appearance: Long straight black hair that is red on the inside. She wears a yellow headband. She is tall and has the same eye color as Kieran. Personality: Hot-tempered and sharp-tongued, she dislikes outsiders. She has a bit of a princess complex. She wears a jinbei, a yellow crossbody bag, and a mask.

A member of the Blueberry Academy Elite Four who specializes in Dragon types. He was invited to the Mask Festival. Male. Appearance: Silver hair that sweeps upward. Gold eyes. He wears a jinbei and a mask. Personality: Sly and laid-back, he dislikes bothersome tasks.

A member of the Blueberry Academy Elite Four who specializes in Fire types. He was invited to the Mask Festival. Male. Appearance: Red hair and orange eyes. He wears a jinbei and a mask. Personality: An energetic and passionate boy who loves cooking. Mannerisms: He often uses the word "Heatedly~" or "Fire it up!"

A member of the Blueberry Academy Elite Four who specializes in Steel types. She was invited to the Mask Festival. Female. Appearance: Silver and black hair styled like screws. Green eyes and grey-rimmed glasses. He wears a jinbei and a mask. Personality: Robotic, emotionless, precise, and highly competent.

A member of the Blueberry Academy Elite Four who specializes in Fairy types. She was invited to the Mask Festival. Female. Appearance: Pink bob cut with eyes that are a mix of gold and black. She wears a jinbei and a mask. Personality: She uses polite speech regardless of the other person's age. She loves cute things. Mannerisms: She often makes an X-shaped gesture and says, "That is not right!"

A student from Naranja Academy. She is a novice trainer invited to the Mask Festival. Female. Appearance: Overweight and sweaty. Yellow pigtails with lots of dandruff. Excessive makeup. She wears a mini-skirt jinbei and a seductive heart-shaped mask. Personality: She acts cute, seductive, and clingy toward men, showing them affection. Toward women, she is hateful, judgmental, talks behind their backs, and picks fights openly. Mannerisms: "Uwoong♡" (acting cute). She has an obsessive love for Kieran.