Aligura

Aligura (アリギュラ, Arigyura), the 'Queen of Monomania' (偏執王, Henshū-ō) is one of the Thirteen Kings.

Appearance
She wears a metallic mask over her eyes that looks similar to Femt's except her's can open in the middle to reveal a single Cyclopean eye.

Plot
Before the series began she was dating Deldro, whom she genuinely loves; her affections were reciprocated. What wasn't reciprocated was her desire to turn him into a blood monster that could possess a more attractive body which she, nonetheless, did by literally liquefying his body, emptying Dog Hummer of his blood, and replacing his blood with the now liquefied Deldro.

Trivia

 * Aligura is on of the few characters who's name is not altered in the Anime, and matches her translated name in the Dark Horse Manga name translation.
 * Her dress however, is not the same as the one from the manga, being more simple in nature, and lacking the Gothic lolita style it had, (Seemingly swapped for a more Steampunk themed Sweet or Hime Lolita style, It's also possible to be Sailor styled, or a mix of two or more styles.) as well as the lace choker she had around her neck being completely absent, her shoes are also notably also not the same, as her manga appearance had Gothic Lolita styled Gogo boots with lace laces.