Ultima

Ultima 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.

Dispatched to Gabil corps as an intelligence officer

Appearance
A girl with bluish purple long hair styled as a ponytail.

Personality
Rimuru thinks the one with the cruelest personality among the three Demon Dukes might be Ultima.

Abilities
memory extraction

Ultimate skill "Poisonous Death King Samael"

Trivia

 * She was named after sports car manufacturer Ultima Sports Ltd.