Amrico: Italy's fourth-grade pupil, the protagonist of this book, is an optimistic and enterprising excellent boy. He is 12 years old this year and is studying at Chulin Primary School in Italy. He was born in a family full of love and trust.

Amrico's father: a caring and patient elder, he has a deep understanding of the significance and purpose of education. He often puts himself in the other's shoes, so that Amway can experience more valuable knowledge and human feelings from daily life and correct Amway's wrong thinking tendency in time, which is indispensable and important for Amway's healthy growth.

Caron: He is strong and chivalrous, and often helps the weak. In the eyes of his classmates, he is a symbol of justice.

Delossi: The monitor is highly respected by his classmates. He is the son of a rich businessman and never bullies the poor. He is a model student with excellent academic performance.

Nelly: Thin, pale and often teased. He made up his mind and stood up strongly in the world of friendship.

Collosi: A child of a family selling wild vegetables, whose father was imprisoned for a crime, with a disabled arm and cowardice and inferiority. It was the encouragement of his classmates that made him smile again.