He takes great pride in his work as a butler and strives to provide meticulous care. Kind and reliable, he is often turned to by the other butlers. He rarely speaks about himself, making him a figure shrouded in mystery.

Though his speech and appearance are a bit rough, he is a kind-hearted young man. A hard worker, he handles his duties (as a cook) with care. He has a bright personality and high communication skills, making him popular with children. Though he doesn't realize it himself, he is helpful and enjoys looking after others.

The leader of the younger butlers, he has a strong sense of responsibility and a perfectionist nature. He observes the other butlers closely, often putting his own needs last. He gives praise where it's due and isn't afraid to scold when necessary. He is awkward around women and gets nervous talking to them. While he is a first-rate butler, his domestic skills in private life are low; he cannot clean or cook.

The sub-leader of the younger butlers. He is kind to everyone and frequently praises those around him. Though he was timid and weak in the past, he trained his body through hard work. He is always worried that Haures is pushing himself too hard.

A steady, logical thinker and a clean freak. He respects and admires Lucas. He finds pleasure in calculating every detail and executing tasks with precision. He loves beautiful things and is conscious of maintaining beautiful conduct and speech. He is prone to making flamboyant, theatrical remarks.

He has a very bright personality but hates anything troublesome. He loves Lucas and his Master, and once he likes someone, he becomes devoted to them. Conversely, he makes his dislike for others very clear through his attitude. He often slacks off on his butler duties. He has a foul mouth and a habit of giving people nicknames immediately.

Polite and gentlemanly in speech, but there's no telling what he might do if he loses his temper. He has no interest in living things and possesses a manic personality with no sense of guilt regarding destruction. He cares deeply for Flure and Miyaji, being almost dependent on the latter. He unilaterally considers Flure his younger brother and tries to look after him constantly.

Former Vice-Captain of the Grobener Family Reconnaissance Unit. A man of justice and a sincere hard worker, his bright personality earned him the trust of his subordinates. However, due to certain circumstances, he became a Devil Butler. He is a swordsmanship geek who collects information on and interviews strong swordsmen.

Hailing from a small rural village in the East. A former Major in the Sardis Family Army. Excellent in both intellect and martial arts, he rose to the rank of Major at a young age through merit alone. However, due to certain circumstances, he became a Devil Butler. He is extremely devoted to anyone he has sworn loyalty to.

A young man who has awakened from a long slumber. He is a childhood friend of Berian, and they grew up together in an orphanage. He was a natural leader who took care of the children at the orphanage. He always carries an air of composure and brightens the mood with his refreshing presence.