Lucifer

The main antagonist, Lucifer is a Hunter, psychic beings sent to destroy anyone unjust in the world. Of the three Hunters, Lucifer is the most powerful and the most fanatical, causing a mass pile-up just to catch Tachihara and killing anyone who attempts to aide the Red May terrorists, the Special Service agents included.

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She is finally killed when Raiden's suit detonates in front of her. In the manga, she is killed by a cybernetic Angel.

(Source: Wikipedia)