The main characters are the three little pigs and the big bad wolf. Each pig has its own personality. The first two pigs are a bit lazy and build their houses quickly with not-so-strong materials like straw and sticks. The third pig is hard - working and builds a strong house of bricks. The wolf is cunning and tries to blow down the pigs' houses to eat them.
In the story of the three little pigs, the characters play distinct roles. The three little pigs are siblings. The first pig might be seen as naive as he chooses straw for his house, thinking it's enough. The second pig, while a bit smarter than the first, still makes a mistake by using sticks. The third pig is the smartest and most responsible. The big bad wolf is the antagonist. He is sly and uses his strength to try and break into the pigs' houses. He represents danger and the need for the pigs to be clever and resourceful.