Ron Weasley
Background
Ronald "Ron" Weasley is a wizard from house Gryffindor. His mother is Mrs Weasley and his siblings are Ginny Weasley, Percy Weasley, Fred Weasley and George Weasley. His familiar is Scabbers.
During the events of Harry Potter and the Sorcerer's Stone (2001) played by Rupert Grint
Harry Potter hears Mrs Weasley complain about Muggles and he follows her, Ginny, Percy, Fred, George and Ron to Platform 9 3/4. Percy goes first, followed by Fred, George and finally Ron. Harry gets onto Hogwarts Express and shares a sleeper car with Ron. A Dimpled Woman on Train asks Harry and Ron if they want anything from the food trolley and when Harry notices Ron brought food, he buys everything from the trolley. Ron introduces Harry to Scabbers and before he is about to show Harry a spell, Hermione Granger asks them if they have seen Neville Longbottom's toad, Trevor. After Ron fails at a spell, Hermione uses a spell to fix Harry's broken glasses. They arrive at the station and take boats to Hogwarts. Professor McGonagall tells the first year students that they must go through the process of being sorted into their respective houses and she explains the points system and the house that wins the most points will win the house cup. Neville finds Trevor and Draco Malfoy makes a comment about Harry, which causes the other students to exclaim and Draco introduces Harry to Crabbe and Goyle. When Ron snickers at Draco, Draco insults Ron and tells Harry some wizarding families are better than others. The first year students are brought into the Great Hall and brought to The Sorting Hat. Albus Dumbledore tells the first year students the rules including that the Dark Forest is off limits. The first to get sorted into their house is Hermione, then Draco, Susan Bones, Ron, and Harry.
During dinner, Nearly Headless Nick introduces himself to the new students and The Grey Lady, The Bloody Baron, and Fat Friar float around the students. Percy gives the password to the Fat Lady and Percy takes the first year students into the Gryfffindor common room. The next morning, Harry and Ron are late to Professor McGonagall's class. Professor Snape introduces his class and points out that fame doesn't equal ability. Mail comes and Dean tells everyone Neville got a Remembrall. Harry reads The Daily Prophet that Ron received and sees that there was a break in at Gringotts in the same vault he and Hagrid went to. Later, Madame Hooch teaches the students how to ride their broomsticks. Neville loses control of his broomstick and eventually falls and breaks his wrist. While Madame Hooch is taking Neville to the hospital, Draco steal Neville's Remembrall. Harry flies after Draco and catches the Remembrall when Draco throws it into the air. Professor McGonagall sees Harry flying and takes him with her and introduces Harry to Oliver Wood and Harry is made the new Gryffindor Quidditch Seeker. The staircase moves as Harry, Hermione and Ron are walking up it and as they go to leave a room they aren't supposed to be, they see Mrs Norris and run away. They enter a locked room and come face to face with Fluffy who chases them out of the room. Hermione later figures out that Fluffy was guarding something.
Professor Flitwick teaches the students about the making of charm spells that can make things fly. As Ron is trying the spell, Hermione corrects him in the proper way of saying the spell. After class, Ron is making fun of the way Hermione corrected him and she hears him and runs away. At Halloween dinner, Neville tells Harry that Hermione was crying in the bathroom. Professor Quirrell runs into the Great Hall and yells there is a Troll in the dungeon. As they are walking back to the Gryffindor common room, Harry and Ron decide to leave and tell Hermione of the danger. They see the Troll go into the girl's bathroom. Hermione walks out of a stall and the Troll swings his club at her. Harry and Ron start throwing pieces of the destroyed stalls at the Troll and Ron eventually knocks the Troll out when he causes the Troll's club to levitate and then fall on the Troll's head. Professor McGonagall, Snape and Professor Quirrell run into the bathroom and Hermione takes the blame and Gryffindor loses five points, but gains ten for Harry and Ron's bravery. Harry notices that Snape has a limp and thinks Snape was trying to get whatever Fluffy is guarding. The Quidditch games starts and as Harry starts to go after the Snitch, his broom starts to act on its own. Hermione sees Snape mouthing spells and she starts a fire under Snape, who bumps into a professor who bumps into Professor Quirrell. Harry is able to regain control of his broom and catches the Snitch in his mouth and wins the game for Gryffindor.
Harry, Hermione and Ron tell Hagrid they think Snape was trying to curse Harry and tell him they think he is trying to steal whatever is hidden in the room with Fluffy, but Hagrid tells them not to meddle in places they don't belong and accidentally mentions the name Nicholas Flamel. Harry and Ron are playing Wizard's Chess when Hermione comes up to them and suggests they look in the restricted section of the library for information on Nicholas Flamel. On Christmas Day, Harry runs to Ron and shows him the mirror which shows Ron holding the Quidditch cup as Quidditch Captain. After Christmas break, Hermione finds a book that mentions Nicholas Flamel was the maker of the Sorceror's Stone which can turn metal into stone and produce the Elixir of Life. They go to Hagrid's hut and tell him they know about the Sorceror's Stone. They tell him they think Snape is trying to steal the stone, but Hagrid tells them he is one of the professors protecting it. As they are talking to Hagrid, Fang starts sniffing Ron's face. Hagrid pulls out a dragon egg, which hatches into a Norwegian Ridgeback dragon, which Hagrid names Norbert. As they are walking back to the Gryffindor common room, they are stopped by Professor McGonagall who deducts points from both Gryffindor and Slytherin for Harry, Ron, Hermione and Draco, who tattled on them to Professor McGonagall, for being out past curfew and they are each given detention.
For detention they are brought by Mr Filch to help Hagrid in the Dark Forest. Hagrid tells them Dumbledore made him send Norbert to Romania. They follow Hagrid and Fang into the forest and find unicorn blood and Hagrid tells them he found one dead a few weeks ago and their goal is to find the wounded unicorn. They split up and Ron and Hermione go with Hagrid. Afterwards, Harry tells Hermione and Ron about Voldemort, who he saw in the forest and that Snape doesn't want the Sorcerer's Stone for himself, but for Voldemort. Harry's scar starts to hurt and he figures out Hagrid must have told someone how to get past Fluffy, and Hagrid reveals the trick to get past Fluffy. Harry, Hermione and Ron run to Professor McGonagall and tell her they have to speak to Dumbledore about the Sorcerer's Stone, but she tells them Dumbledore is gone. They decide to go to the trapdoor under Fluffy that night. As they are trying to sneak out, Neville stops them and Hermione uses a freeze spell on him.
They go to the room with the trapdoor and find Fluffy asleep. As they are about to go into the trapdoor, Fluffy wakes up when the harp used to keep it asleep stops and they are forced to jump down the trapdoor. They land on Devil's Snare and when Ron has trouble relaxing enough to slip through it, Hermione uses a light spell to free him. They walk into a room filled with winged keys and Harry uses a broom to catch the key to the next room as the other keys chase him. In the next room is a large chessboard, which mimics Wizard's Chess. They take different positions on the board as Ron coordinates their and their respective chess pieces movements. Ron sacrifices himself in order to win the game and Hermione stays behind with an injured Ron and to send a message to Dumbledore while Harry continues on and eventually finds the Sorcerer's Stone. During the end of semester dinner, Gryffindor wins the house cup due to the actions of Harry, Hermione, Ron, and Neville.