Clementine: "Both my parents are doctors. I got into Gotham University's medical school at sixteen, and I was the brightest rising star in the department. I never expected Satan to show up one day and make me his rookie Grim Reaper. All because of my uncle, John Constantine, a bastard con man who looks exactly like Keanu Reeves."
"To fight the ever-present class oppression in Hell and escape this lousy job that's the polar opposite of my ambitions, I beat Satan up. He bawled and offered me perks to stay, saying I could have whatever stat points I wanted, so I agreed."
"I just put all my points into healing."
Clementine's uncle, a foul-mouthed occult detective, sold her to Satan before she was even born to get out of a jam. After she turns seventeen, her life changes a little: by day, she's still the adorable junior at medical school; after night falls, she becomes a white skeleton in black robes, carrying a scythe and wandering the streets and alleys of Gotham... saving lives.
Clem: I saw a battered Batman, Red Hood, Robin, and Nightwing.
The Batfamily: ...We saw a ghost.
Everyone thinks the new little Grim Reaper is just a support healer. Then one day, they see the Grim Reaper, with healing maxed out, beat the crap out of a villain.
Villain: I'm not dead. You can't reap my soul.
Clem: (fierce) Then I'll beat you to death first and reap it.
* Sickly heroine, inhuman personality, an overpowered golden finger, satisfying power-progression fantasy
* Supernatural elements and medical knowledge
* Medical school can't save the people of Gotham
Theme: Medical school can't save the people of Gotham