Even after the World Tree warned him that his soul might suffer damage, and that in the worst-case scenario he could lose many of his real memories, Ash remained unwavering in his decision to have those memories removed.
His reasoning was crystal clear. He understood that if he did not sever this cancerous cluster of foreign memories from his mind, there was a high chance he would eventually commit something he would regret for the rest of his life.
What brought him a strange sense of relief was the fact that his unwavering desire to save Elysia had acted as an anchor, helping him stay afloat despite the torrent of corrupted memories flooding his mind. It was because of that strong intent that he was still walking on the path to save her, instead of losing his identity or spiraling into madness.
In the simplest terms, it was his love for Elysia that had saved him.
