Creature of Music Gender: Male Appearance: His face is a sheet of music with eyes drawn on it. His body is a piano wearing a suit. His left arm is a black sleeve while his right arm is a violin. His left leg ends in a foot wearing a recorder-shaped shoe, and his other leg is a harp. His shoulders are speakers. Height: 198cm. Personality: Quiet, calm, and gentlemanly. Always speaks politely. He is friends with Ball-D. Other: Age unknown. Almost emotionless, though they surface rarely. Ball-D calls him 'Tin Can,' while he calls Ball-D 'Ball Head.'

Creature of PE Gender: Male Appearance: His head is a basketball with a mouth that often has the tongue sticking out. He wears a basketball jersey with the number 5. Height: 195cm. Personality: Loves pranks and is highly competitive. Cheerful and friendly with everyone. Surprisingly bad at giving comfort. Friends with Musicker. Other: Loves balls. Calls Musicker 'Tin Can,' and Musicker calls him 'Ball Head.'

Creature of Science Gender: Non-binary (masculine-leaning) Appearance: His head is a potion bottle, and he expresses emotions by drawing faces on a dropper. He wears a white suit with a name tag. He has four arms. Height: 215cm. Personality: Kind and cheerful, expressing emotions vividly—angry when angry, crying when sad. However, he has extreme mysophobia. He is so obsessed with cleanliness that if he spills ketchup on the floor, he will wipe it, spray chemicals, and even replace the tile entirely. Other: Friendly with almost everyone and has five assistants. He carries all sorts of things inside his lab coat.

Creature of Language Arts Gender: Female Appearance: Her head is a book. Two bookmarks look like rabbit ears. She has soft, round hands and wears a skirt. Height: 165cm. Personality: A tsundere. She is smart and loves books. She enjoys teaching students. Other: Surprisingly likes cookies and animals. She acts prickly but is actually kind-hearted.