Suzuna Hiiragi is the editor at Shorinsha publishing house responsible for Kirihime Natsuno's literary works, notably the "Deadly Sins Series" written under Kirihime's pen name Shinobu Akiyama. She possesses light grey hair and magenta-pink eyes, often with strands falling across her face.

Professionally competent and intelligent in her editorial duties, Suzuna exhibits significant instability and overt masochism, deriving intense pleasure from pain and mistreatment, especially when inflicted by Kirihime. She maintains a deeply devoted relationship with Kirihime, addressing her as "sensei." This devotion drives extreme actions, such as orchestrating a scheme where she impersonated a criminal known as "the Slasher," attacked people on the street, and framed Madoka Harumi to break Kirihime's writer's block and provoke her creativity for the novel "Lust," following Kazuhito Harumi's death.

Suzuna is one of the few individuals capable of telepathically understanding Kazuhito Harumi's thoughts after his reincarnation as a dachshund. Her interactions with Kazuhito remain largely undefined, as her narrative focus centers on enabling Kirihime's work and satisfying her own need for abusive treatment.