Peter - the eldest of the Pevensie children, and the ruler of the Kingdom of Narnia after the White Witch's demise. As the oldest, he was responsible and caring, always wanting to do what was best for his siblings, therefore becoming High King over his brother and sisters.
Susan - the second-born of the Pevensie children and eldest sister. She was known to the Narnians as Queen Susan the Gentle, and was known to be logical (to the point of being stubborn), motherly, and more serious than her younger sister.
Edmund - the third of the Pevensie children, and the second one to enter the magical world of Narnia. He was mischievous, dry witted and rather sarcastic, but changed largely after his experience with the White Witch who tricked him into betraying his siblings for her.
Lucy - known as Queen Lucy the Valiant, she was the youngest of the four Pevensie children, and was the first one to discover Narnia. She served as the main protagonist, as she urged her siblings to visit Narnia and to help save Narnia from the White Witch.