Angel Of Mercy (WIP)

When the enigmatic detective, L, calls in reinforcements in his investigation against Japan's newest serial killer, he inadvertently brings in a much greater threat - the only foe who ever escaped his justice.

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Kira holds Japan in his grasp as he targets criminals escaping justice. Some call him a hero. Others seek to catch him.
The world's greatest detective, L, takes on the case but quickly finds himself thwarted at every turn. Kira is unlike anyone he has ever faced before - silent, meticulous, and seemingly as intelligent as him. In his desperation, L calls in C. She is his perfect match in all fields but holds no scruples and isn't afraid to place herself in a killer's mind if that solves the case. Yet her greatest asset is her ability to see the dead and dying. Together, L and C prove a fearsome challenge for Kira. Yet the secrets surrounding her, which L is determined to take to his grave in order to protect her, threaten to surface.
With everything to lose, can L keep C on his side? Or will the haunting past clash with the deadly foe of the present to determine a future where L is no more?
Three players, one fatal outcome - who will be the last one standing?

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[[Ongoing; average word count per chapter - 3.500]]
IMPORTANT; please read the author's note for all trigger warnings. I do not go easy on my characters, and Death Note is heavy material as it is. Advised for mature audiences.

Some knowledge of the anime is advised - the story takes place mid-investigation, during the Summer months of 2007 (2004 in the manga).

Disclaimer; I do not own anything from the Death Note universe. The story belongs to Tsugumi Ohba, this is fanfiction in tribute to his work. Only the female mc and her story woven into the existing Death Note storyline are mine.
There will also be some references to the series The GhostWhisperer.

The game begins - I use lyrics from the Death Note musical as chapter titles. Can you guess the song?