This might be a bit of a stretch, but it really reminds me of 9SвЂ™s eventual deterioration despite his bond with 2B. Two extremely different emotional states and mindsets. Although we learn that 11B had abused 16D, 16D still feels betrayed. The track starts off with eerie and metallic sound effects, then eases in with sorrowful and haunting vocals, reflecting 16DвЂ™s state of mind perfectly. Slowly but steadily, the OST вЂњBroken HeartвЂќ starts playing. An interesting thing to note is that when she first takes in this information, all music stops, drawing out her shock. If you choose to tell 16D the truth, her mental state makes a drastic turn for the worse as she reveals her true feelings towards 11B. Before 16D learned about her escape plan, she had been successfully fooled into thinking it was a courageous act: To be fair, the title itself is a massive hint that we (and the androids) are being lied to about the nature of YoRHa, and is extenuated in this eventвЂ™s context because 11B herself had lied to everyone in order to escape.

When 2B delivers the log to 16D back in the Bunker, the usual Bunker OST theme вЂњFortress of LiesвЂќ plays. Keep 11BвЂ™s plans to yourself.В - Widespread Illness OST.Tell her about 11BвЂ™s attempted desertionВ - Broken Heart OST.11BвЂ™s log reveals that she had escaped her duty/post (but ended up dying anyway). HerВ вЂapprenticeвЂ™ 16D asks 2B to retrieve any information left about her. Summary: 11B, who was in 2BвЂ™s squad on the initial attack on the abandoned factory at the start of the game, died. Just wanted to share a few thoughts and things IвЂ™ve realized when watching 11BвЂ™s momento side quest playthrough in regards to the events and the music used. NieR: Automata & OST usage - 11BвЂ™s Memento

Nier automata fortress of lies