My father did— he specialized in the type of construct KaITO was, so he was able to repair what his creators had damaged.

[he pronounces the name a little differently from his own, with more emphasis on the second syllable]

It didn't make everything better. He still had to live with the memories of what was done to him, and what he had done to others, and that sort of thing leaves its own damage. But he stopped being a danger to himself and others.