Ciel

Previously known as Cyanide, they were a color fixer that worked under the Vermilion Ace. They specialized in hunting abnormalities and anything you could call a "monster".

She was forcibly distorted by Lucisfear's Rapture after Moses's and Zechariah's deaths, turning into the Echo of the City.

The distortion was extracted from her thanks to Kuon, Tael, Jhin and the Manager, all who gave her enough of a shock using Kuon's Rapture (after having removed the source of her anguish by essentially destroying the city) for Zechariah to make his final move, momentarily taking control of Ciel and utilizing her fatebreaker's properties against the distortion to give her a chance to fight back.

She is Eve's daughter and she was raised by Zechariah and Moses, having now inherited both the remains of L-Corp and Hana Association.

Appearance
After returning from the distortion, she now wears

While they were distorted, they used to wear entirely white blanket and presented Lucisfear's golden eyes.

Abilities

 * Mental fortification : After distorting, her already strong will was further fortified, gaining a very high resistance against mental attacks.


 * Fatebreaker : She wields fatebreaker twin blades, that become extremely effective and deadly against enemies she views as monsters, true threats to the world or society, so essentially against those whose nature or way of being she considers abominable.


 * Vermilion Code : The fallen Vermilion Ace taught her his own spellblade fighting style, combining casting with swordplay and drain magic through the use of weapons that emit ether, being able to form countless invisible shapes and forms that can be segmented and utilized to cast a variety of spells.


 * Remnant of the Black Throne : She retains a small fragment of the empowerment she received while distorted by Lucisfear's black Rapture.

Trivia

 * His fixer title was a play on Cyanide (the poison), the word which containing "Cyan", the blue tone.