Sora

Sora fell into Quadratum the world you live in. He has no memory of his past. He doesn't know where he's from or who his family or friends are. He only remembers his name Sora. When mysterious creatures called the Heartless appear Sora pulls a weapon out of thin air that resembles a giant key and destroys the Heartless like it's second nature to him although he doesn't know how he does it.