Heartwarming / The 15 Keys

• The whole part in the fortress. Why is Zach saving Monica? At first it seems like he feels he must, but later you realise it's because he loves her like a sister.
• When Lucy appeared. This is a diclonius who is meant to kill humans, and she DOESN'T kill Zach because she can see in his eyes what he is thinking.
  • Which is along the lines of "I was lucky in that vision."
• When Aelita and Zach's relationship starts to flourish, specifically with the scar near his heart on his chest... She used a texta to make it a smiley face just because she wanted to see him cheer up.