Rei Takashima

Rei Takashima was a former prison doctor at Deadman Wonderland.

Appearance
Rei Takashima had short, cheek length, light-brown hair held in the style of a bob. She also had brown eyes. She wore red lipstick, a lab coat, glasses and a tight-fitting short black dress and had a beauty mark on the left side under her mouth.

Personality
At first, Rei Takashima appeared to be a level-headed and typical doctor, even showing remote signs of care for her patients. However, she received immense pleasure from removing body parts of Deadmen when they lost a Carnival Corpse and also becomes enraged when she doesn't get to remove a non-regenerative organ. Like most staff at Deadman Wonderland, she was very sadistic.

Deadman Arc
Takashima is first introduced after Tamaki collapses a tower on Ganta. Ganta goes to her office, where she fixes him up and tells him about the candy. She appears a second time when she analyzes Senji's X-rays.

However, when Senji loses his battle against Ganta Igarashi, she more than happily removes his right eye and gains pleasure doing so, therefore exposing her sadistic side.

Later on, when Minatsuki faced her penalty of losing an organ at random, she only had to lose some of her hair as it had been rigged by the members of Scar Chain; this caused Takashima to become furious.

Forgeries Arc
She has been seen helping Tamaki with his plans on the Forgeries experiments on random Deadmen. She has also given Azami Midō her Snake Branch of Sin, making her a Forgery.

Revolt Arc
She first appears after Ganta is kidnapped by Tamaki. She is seen conducting tests on Forgeries. When Ganta refuses to help Tamaki with his plans, he is captured and tortured by Rei. After the Deadmen defeated the Complete Forgeries, she broke down crying and doubts that they could defeat Wretched Egg. However, Tamaki strangles her for doubting his goal to defeat Wretched Egg.

She is later seen busy in her laboratory and eventually killed by an unknown being (most likely the Wretched Egg).

Trivia

 * In an extra short-story in Chapter 12, incidentally tilted 'Perfect Man', Rei is shown treating an anatomical mannequin named "Tsutomu" as a lover with actions such as complaining to him about not being able to remove an organ or two from Minatsuki and that there's nothing wrong with her wanting to do so. She also accuses the mannequin of being a flirt because she can see right through him.
 * In the anime's ending sequence, she is implied to have worked in the same hospital as Karako once did.