Pedro’s mother, responsible for the home, often depicted caring for her family. She is seen as wise and supportive, offering guidance to Pedro throughout the story.

Pedro’s father, known for his creativity and resourcefulness, ensuring his family’s welfare through hard work. He supports his children’s education and creativity despite limited resources.

Pedro’s grandfather, referred to as Abuelito, who has lived his life in Jalisco, Mexico. He imparts lessons on responsibility and compassion through his experiences and stories.

The oldest Martín child, acknowledged for his academic achievements and trusted with responsibilities on family trips. He is known for his interest in science and music.

Pedro’s sister, a figure of kindness and compassion, who influences Pedro with her passion for history and social issues. She is observant and responsible, often guiding her younger siblings.

Pedro’s older siblings, collectively called "Barn Babies," who add humor and mischief to the story. León and Noé are pranksters, while Ruth is known for her adventurous and business-minded spirit.

Pedro’s younger siblings and companions, involved in playful misadventures and providing real-time feedback to Pedro. They share a bond of brotherly love with him despite their teasing and squabbles.