The Chiesters are bunny-girl servants summoned by Eva Beatrice. It is said that there is no escape from the Chiesters attacks, and they can even locate and bring back a corpse. They have red eyes, bunny ears, and elaborate military-styled outfits. It is hinted that they are connected to Maria's three (originally four) rabbit toys.

She is named after the .410 Winchester shotgun. Chiester 410 wears a blue uniform and has short teal hair. Unlike Chiester 45, 410 has a childish, silly smile on her face most of the time. Her duty is the main sniper using the information from Chiester 45.