"Did we ever know what was right and wrong before we truly began to live?" Eito tosses the question out rhetorically, but he can't help but wonder. All of those memories may have been fake, but they still shaped the people that received them into who they are. Decided their morals, what they held dear, what they wanted to protect.
Eito himself knows he was made to save the "earth," the obsession he has with the thought of it's beauty and nature needing to be protected from World Death must have been what was intended to shape his own morals, despite not having seen a plant native to Earth in his life. The fact of the matter is that something beautiful, the planet that gave birth to humanity, was being destroyed and it was Eito's duty to save it. Were that all there was to his memories, he'd probably march forward with the rest of the SDU in the same goal.
But, something happened to Eito when he was fed those memories that entirely flipped his intended purpose. Now his role as a guardian of earth and defender of it's blue moon like his very name implied has been directed back at those who destroyed Earth in the first place, arming him with the single minded goal of destroying them by any means necessary.
His home life was cold and loveless, his time in the hospital was atrocious and everything seemed to line up far too well into forcing Eito to hate humanity with all his heart with his disorder acting as the just desserts pushing him to think like that. All humans were ugly, vile and reeking, with their hearts as rotten as their appearances. There was no such thing as genuine kindness or true love.
"Despite everything I've done to you, you've spared my life. Twice. You even chose to let me back on the team regardless of me having any reason to be trusted. I'd been questioning my worldview since you spared me the second time, but you've more than solidified it in recent days."
Eito sends Takumi an easy smile.
"You are the first person I've ever known to be genuinely kind to me. No matter how many times I stabbed you in the back or betrayed your trust, you never gave up on me. You saw something in me worth loving, when I myself could not find it. That isn't selfishness, Takumi. Trusting me again after everything I've done is the most altruistic thing I've ever seen. You risked the lives of everyone here and aboard the satellite to trust me again, and that kind of evidence to you being genuine to me is impossible to ignore."
He comes closer, taking in Takumi's sent, forcing himself to take it in. He needs to commit it to memory, the one person whose cared for him from the bottom of his heart.
"Its no wonder I want you so badly. I fear loosing the only love I've ever felt in my life if I do. I don't want to give you to anyone else, such a pure and kind guiding light. I want to hold onto this feeling forever, and have it all to myself."