Agera

Agera (アゲラ) is a Marquis in the Daemon Realm and one of Carrera's subordinates. He is the reincarnation of Byakuya Araki, founder of the Hazy Style and Hakurou's grandfather and master.

Appearance
A middle-aged man with white hair speckled with gold, brushed back and tied up in a knot. According to the text, contrary to the design given by the official illustrator, he has a long white beard and a thin, wrinkled face. However, his sharp eyes and straight, clean posture showed no signs of aging. He is dressed in eastern garbs consisting of a blue kimono and white hakama, held together by a purple obi sash. In addition, Agera also wears white boots and carries on him a katana concealed within a red sheathe.

Personality
Agera acts as the voice of reason for Carrera, as well as for his fellow lieutenant Esprit, who also serves under Carrera. Therefore, for someone in his position, Agera is calm most of the time. However, since he, like all of Rimuru's subordinates, is extremely loyal and devoted to him, a single insult towards his master is enough to drive him into a rage for a short time. He also gets angry if anyone insults him or his boss Carrera due to his prideful nature as a Daemon, though to a lesser degree.

Background
Agera was born as a daemon some 300 years ago, and was taken under the service of Jaune. Since then he hasn't suffered a single defeat. After he and his master became Rimuru's subordinates, Agera was recruited as an officer in the Black Numbers and given a name and body.

Trivia

 * Named after a mid-engine sports car and a successor to the CCX/CCXR, produced by Swedish car manufacturer Koenigsegg. The name comes from the Swedish verb 'agera' which means "to act" or in imperative form "(You) act!".