Arknights [Book Of Randomness]

Ability to sing (Mephisto)

First time when he lost his ability to sing, only deciding to stay alive after Faust convinced him to live together by swallowing an Originium himself. Later in Chapter 6, he mentally shuts down after witnessing Faust's sacrifice. He recovers somewhat in Chapter 7, still so deep in despair as he walks towards the sarcophagus the amnesiac Doctor was seen being excavated from in Chapter 0, in the hopes of losing his memories along with his pain and imperfections.