My mind was embarking down a dark path, as if a heavy and thick
cloth was gradually covering it. But then—a strong fear
suddenly clenched my heart.

Asuna. If I disappeared and left her in this world, Asuna would
fall into Cradil’s hands and endure the same pain as me. That
possibility formed an unbearable pain which shocked me back
into consciousness.

Was this the end? Was I going to die? Leaving Asuna in this insane world? I resisted the gradually closing sword and the despair that
reached out from within me.

-Kirito, Sword Art Online (Vol. 1, Chapter 15)