[tomtkp]

Originally Posted by M1sFyr3

Spoiler for Questions:

Wait so Kirito became a retard from the damage caused or did a clone of himself become a retard? I'm really confused about what you're saying. I understand Asuna went to replace Kirito, but then do they like reunite or something, since you said it was the ending.

Spoiler for Answer:

It's not the ending as what deedlit said. it's just the ending of the first half of Alicization.

It was Kirito himself that became a "retard". It was some procedure from the US invaders that caused some electric current to flow into Kirito's STL and destroyed his sense of self in the process.

Yes, Asuna and Kirito did reunite but it was the heartbreaking moment in the story.