Carrera

Carrera was one of the Demons summoned by Diablo to serve Rimuru. She was Arch Demon when summoned, but evolved to Demon Duke after she was named by Rimuru.

Dispatched to a corps as an intelligence officer

Personality
she had a childish personality which didn't use her brain and very scary once she get mad

Abilities
Ultimate skill "Death King Abaddon"

Gravity collapse: produces a huge gravitational force on the targeted area. It can cause an implosion if too strong. Rimuru believe that it may be possible for her to create a small black hole or something similar that would result in a very large scale uncontrolled destruction.

Trivia

 * He was named after Porsche Carrera car.