Eirenus

Eirenus is a demon in the Black Army and the right hand of the Black King. She was voiced by Monica Rial.

Backstory
Eirenus used to be a knight serving in the army until she was encountered and corrupted by the Black King who made Eirenus serve in his army.

Chain Chronicle
Eirenus has no recollection of her human memories and became the leader of the Black Army and the right hand of the Black King.

Eirenus debuts in episode 2 where she is summoned by the Black King who orders her to find his daughter, Phoena.

In episode 3, she appeared before Volunteer Knight, Burckhardt, and tortured him to tell him where the Chain Chronicle book is. Just then, Yuri and the Volunteer Army arrived to save him, but Eirenus summoned the Black Army to fight them while she continued to torture Burckhardt.

Physical Appearance
Eirenus does not wear a lot of clothes, but is seen wearing black armor such as shoulder pads, gloves, and boots.