“I understand the feeling of not wanting to discard your memories, but from the standpoint of reconstruction, the stuff that is going to get in the way needs to be discarded.” (Naofumi)
“But-“ (Kiel)
“Kiel-kun! Stop saying selfish things!” (Raphtalia)
Raphtalia warns him. Well, there's not necessarily a need to stop him.
Even so…
“This is the house that you once lived in.” (Naofumi)
“It is!” (Kiel)