Sora is a teenager who joins his friends in a fight against the Heartless and the Nobodies. He is the wielder of the Keyblade.
When Sora was born, his heart contacted with Ven's for healing. 4 years later, Ven's heart fused with Sora's for relaxation for Ven. Sora was a 14 year old boy who lived on the Destiny Islands along with his friends Riku and Kairi (from Radiant Garden). One day they decide to build a raft and explore different places when Riku starts to think about why they are there. So the night they finish the raft their world is attacked by the heartless during a storm. Sora is unable to harm any of them and outruns them searching for Riku and Kairi. He encounters Riku during this with Darkness beneath him. Riku vanishes and Sora ends up with the KeyBlade due to Ven's heart.
In possession of the Keyblade, Sora was now able to harm the Heartless. Sora entered the opening beside the waterfall and saw Kairi. The door behind her opened unleashing a massive amount of wind flinging her towards him. She phased right through him and Sora was blown out of the opening onto what was left of the . Sora encounters a giant heartless that resembled him and Sora defeats it.
After that he ended up in a town known as . After wandering around town for a bit Sora meets a man named Squall (aka Leon) and a girl named Yuffie who tell him all about the Heartless and his weapon the Keyblade. told him that a man named Ansem, the leader of his world studied the Heartless. Their conversation is cut short when Yuffie screams when a heartless appears. dispatches it and tells Sora to leave and find the leader.
On the way to the leader Sora encounters Donald and Goofy, the people who on request from the king were looking for him. Together they defeat the Guard Armor and since Sora has the Keyblade they decided to travel with each other. They travel to different worlds and find out the Keyblade can seal keyholes. Keyholes are what lead to the heart of the world it is located in and can be locked to prevent Heartless from entering.
Sora, Donald, and Goofy eventually get to Hollow Bastion-- Ansem’s home. While there Riku takes Sora’s Keyblade and Donald and Goofy leave with him following the King’s orders to follow the key. Sora is left with Beast and they journey into Hollow Bastion. When they find Riku Sora recovers the Keyblade again and they battle. Sora wins and Riku flees in shame. Donald and Goofy return to Sora and they reconcile. They journey further inside and battle Malificent and defeat her both in her normal form and as a dragon.
The trio then encounters a different Riku and they find Karii’s body. Ansem said that he was possessing Riku. Ansem explained that Kairi was a princess of heart and her heart was trapped inside Sora when the were destroyed. Sora and Ansem then engaged in battle with Sora ultimately winning. Ansem’s Keyblade was lying on the floor and Sora picked it up. With one smile to Donald and Goofy Sora stabbed himself with the Keyblade releasing both his heart and Kairi’s. This resulted in Roxas being born.