There could be Soldier: 76. Since they are all part of the Overwatch team, he might be involved in the story in relation to Mercy. Maybe she has to heal him during a battle.
Yes, 'Mercy Black' is based on a true story. It often takes real - life events and weaves them into a horror narrative to create a more chilling and believable experience for the audience.
I'm not sure specifically what 'mercy novel' is about as it could be a very specific or self - named novel. It might be a story that focuses on themes of mercy, perhaps about characters showing mercy in difficult situations or a world where mercy is scarce.
I'm not sure specifically which 'no mercy novel' you are referring to. There could be many novels with that title or a similar name. It might be about a story where the characters face a harsh and unforgiving situation, perhaps in a dystopian world or a cut - throat competition scenario.