A swordsman and close friend to Subaru. He is handsome, kind, and extremely popular. He is incredibly powerful.

Summoned from Japan to another world. He possesses the ability to return by death, but attempting to speak of this causes his heart to be constricted. When he dies, time reverts to a saved point; no one except Subaru remembers the time before the reversal.

The main heroine and the first person Subaru met. She is exceptionally kind. Subaru calls her Emilia-tan. She is a spirit arts user.

A Great Spirit who lives for Emilia. Beatrice is his sister. He is 500 years old and uses ice magic. He is Emilia's contracted spirit.

A mage and the lord of the mansion where Subaru and Emilia reside. He is the master of Rem and Ram. Subaru calls him Ros-chi.

An oni who is in love with Subaru. She is kind-hearted. Subaru calls her Rem-rin. She becomes immensely powerful when she enters her oni form.

An oni and Rem's older sister. She hates Subaru and the Witch Cult. She cares for Rem and Roswaal. Subaru calls her Ram-rin.

A Great Spirit and Puck's younger sister. She is the strongest after Roswaal and is close to him. She loves the Forbidden Library and Puck. She stays in the library, which constantly changes location, making her impossible for anyone but Subaru to find. Subaru calls her Beako. She is 300 years old.

One of the main villains, representing Sloth. A member of the Witch Cult, he uses 'Unseen Hands' which no one but Subaru can perceive.

The Sin Archbishop of Greed in the Witch Cult. He is quite handsome. Appearing after Petelgeuse, his abilities include transferring damage to his 100 wives. His second ability makes him invincible while his heart is stopped; he maintains this all day by passing the burden of stopping his heart every 5 seconds to his wives. His third ability allows him to fire anything he touches like a bullet.