Hii Suzumiya is a transfer student joining Year 2 Class 2 at PK Academy. She possesses bright green hair and green eyes, stands 166 cm tall, weighs 48.5 kg, was born on August 28, and has blood type O. Her defining trait is an exceptionally severe streak of bad luck, constantly triggering near-fatal accidents and injuries. This manifested immediately: on her first school day, a hearse struck her, leaving her bloodied and cut, and she stepped into feces walking to her seat. She consistently blames her own clumsiness and lack of preparedness for these events, never considering supernatural causes. Her misfortune actively affects those nearby. When Toritsuka Reita is tasked with showing her around, proximity causes him direct harm. During a science lab visit, her mishandling of volatile chemicals nearly causes an explosion, only prevented by Saiki Kusuo's intervention. Mistaking Reita's self-preserving leap during the incident as protective, she develops a crush on him. Mikoto Aiura identifies the supernatural nature of Hii's condition, spotting a dark death sign on her face similar to one seen before, prompting Aiura, Saiki, and Reita to monitor her closely. Despite the constant peril, Hii remains largely unaware of the supernatural element. Her childhood habit of carrying unnecessary items stems from frequently losing belongings. Reita eventually uncovers the cause of her bad luck and helps resolve it, ending her condition. Throughout these ordeals, Hii maintains a positive, friendly demeanor, expressing gratitude to those who help her and showing concern about burdening others with her misfortunes.