Faceless Character Doomed to Die. Supernatural Reincarnations

Allison is reincarnated as a cannon fodder character and eventual murder victim in a whodunnit arcs in her favorite historically inaccurate magical game. Things escalate quickly when she meets the protagonist of the game and gains not only his attention, but his loyalty and devotion without meaning to. She just wants to figure out a way to not die, not turn into the protagonists best friend! As the plot progresses, she begins to question if her death is an inevitable part of the story or if she can do anything to save herself.