The Big O/Heartwarming

"Dorothy: Roger, I love you."
 * The Closing Credits song "And Forever" by Robbie Danzie and Naoki Takao. It's amazingly heartwarming from an anime that seems to specialize in Mind Screw. Not to mention how cute Roger and Dorothy look sitting on that giant hourglass!
 * Doubly so when you realize the lyrics could be about Roger and Dorothy's relationship.
 * When Dorothy is forced to fight and nearly kills Roger beneath Beck's influence, she delivers an Anguished Declaration of Love.

"Dorothy: If neither of us had memories, and we met, would you and I have fallen in love as well?"
 * And later, from the same episode: