[ ...and neither could he ever hide his connection to and the importance of Mana that way. ]

When I was a child—

[ Ten years old on a cold and despairing Christmas night ]

...I tried to bring my father back to life. But instead, because I was foolish and knew no better, I turned him into an akuma.

[ softly: ]

For that he cursed me.

[ By slicing his face open would be the implication.

But he continues a little more gently, to try and buffer his words. ]

Ever since then I could sense them and see their souls. The part of them that was still human and mourned what they'd become. [ Because what he means Lux, why you shouldn't think it's a sad thing...

...what he means is that's also the most precious sort of thing to him. One that he could never give up. ]