Kobeni Higashiyama is a former Public Safety Devil Hunter who served as a new recruit in Makima's Special Division 4. She comes from a financially strained family with nine siblings and was compelled by her parents to become a devil hunter in order to support her brother's education, with the alternative being work in the sex industry. Her background contributes to her perpetually anxious demeanor and her pragmatic view that normal life offers no escape from hardship. Her primary motivation is survival and the desire to leave the devil hunter profession, but she remains bound by financial obligation to her family. In the Reze Arc, her role is a supporting one within the division, where she participates in missions alongside colleagues such as Denji, Aki Hayakawa, and Power. Though her part in the central conflict is limited, she is present during key events and provides assistance when pressed. Her personality is defined by extreme timidity and a tendency to panic under pressure, often crying or expressing fear in dangerous situations. However, beneath this nervous exterior lies a surprising level of combat proficiency. When forced into action, Kobeni demonstrates remarkable agility, speed, and precision, particularly with knives, and she can become cool-headed and efficient during combat. Her survival instinct is strong, and she has a reputation for emerging alive from situations that should be fatal, which some attribute to extraordinary luck or an undisclosed devil contract. Her key relationships include her colleagues in Special Division 4. She is initially partnered with Hirokazu Arai, who often encourages her, and later with Galgali, the Violence Fiend, with whom she forms a bond. Her interactions with Denji are marked by her fear of danger and his carefree attitude. Her relationship with her family is strained, but she continues to send them her earnings out of obligation. Over the course of the story, Kobeni develops from a frightened novice into a more resilient individual, though her anxiety remains a core trait. Her notable abilities include exceptional physical dexterity and combat skills with bladed weapons, as well as a capacity for intuitive survival against overwhelming odds. The identity of her contracted devil remains undisclosed, adding to her enigmatic nature.