1) tom sawyer: Originally known as Thomas Sawyer, he is a smart and lively little boy with a sense of justice, but he is full of antipathy to his family, school and church; I hate boring courses, deceptive teaching and rigid living environment, and dream of becoming a "pirate" and pursuing a free and adventurous life wholeheartedly. Huckleberry Finn: a recognized "wild child" in St. Petersburg. His father is an alcoholic, unrestrained, but virtuous, and a free-roaming child. Tom has the best relationship with him and regards him as a bosom friend. Later, he was adopted by widow Douglas for saving her life.

2) Polly's menstruation: Tom's menstruation is kind-hearted and strict with Tom, and he is bent on teaching Tom to be a polite and educated boy. Sid: Tom's half-brother, a well-behaved "model child", got good grades. Often opposed to Tom, like to tell Tom that Polly is menstruating.

3) Mary: Polly Menstruation's daughter, Tom's cousin, is also a kind, simple, naive, compassionate and fair girl.

4) Becky Thatcher: Judge satchell's daughter, lively and lovely, Tom's lover, Tom fell in love with her at first sight.

5) Joe Harper: Tom's best playmate and confidant spent a pirate life on Jackson Island with Tom and Huckleberry Finn.

6) Marv Porter: An "alcoholic" went to help young Dr. Robinson rob a tomb in order to earn money to buy drinks. As a result, he was framed by his partner, Injun Joe, as a murderer. Later, Tom was acquitted because of his brave testimony.

7) Indian Joe: Indian, insidious and cunning, killed the doctor while helping Dr. Robinson rob the tomb with Muff Potter, and blamed Muff Potter for the disaster of crops, but eventually starved to death in the cave because of greed.

Judge satchell: Betsy satchell's father, brother of St. Petersburg lawyer Jeff satchell, is a big shot in the eyes of St. Petersburg people.

9) Widow Douglas: Beautiful, kind and rich, because Huckleberry Finn once saved her life and later adopted him.

10) Jim: Polly's little black slave with menstruation, kind and lovely. Amy Lawrence: Tom's first fiancee, Amy.