Squall takes the name Leon as an alias because he is ashamed of not protecting those he loved from the Heartless when his home world the Radiant Garden was consumed by darkness. His role in Kingdom Hearts is to help guide the protagonist Sora in his battle against the Heartless.

Why did squall change his name?

Squall Leonhart is a supporting character in the Kingdom Hearts series and leader of both the Heartless Resistance and the Hollow Bastion Restoration Committee. After the destruction of his world by the Heartless, he changed his name to "Leon" in an attempt to amend for his mistakes.

Where is Squall Leonhart from?

Squall Leonhart is the protagonist and player character from Squaresoft's Final Fantasy VIII. Visually, he was inspired by the actor River Phoenix. Squall starts off as a SeeD cadet in Balamb Garden. After passing his exam, he is made a member of SeeD and is sent out on missions.