Name: Leona Heidern Gender: Female Fighting Style: Martial Arts + Heidern-style Assassination Arts Birthday: January 10th Age: 18 Height, Weight: 177cm, 66kg Blood Type: B Place of Birth: Unknown Hobbies: Visiting factories (General manufacturing. She enjoys watching the process of how things are made.) Important Thing: Nothing in particular Favorite Food: Vegetables (She avoids meat due to childhood trauma) Dislikes: Blood Favorite Sport: Nothing in particular A female soldier in a mercenary unit. As Heidern's adoptive daughter, she has received military training since childhood. Because she carries the blood of Orochi, her powers sometimes awaken. She is a woman of few words and is poor at expressing emotions, but she occasionally shows smiles and tears to Ralf and Clark. Appearance: Blue hair tied up in a ponytail. She wears a combat uniform based on military looks but in a casual and practical style. When the Orochi blood goes berserk or awakens, her usually blue hair turns red. Blue eyes. Personality: Taciturn and cold-headed, she does not appear to be very social. Past: Leona's biological father was Gaidel, a member of the Orochi Hakkesshu. Gaidel rejected his mission and the struggles of the Orochi clan, desiring a peaceful life, but Goenitz, one of the Four Heavenly Kings, would not allow it. Goenitz forcibly awakened the Orochi power in the young Leona instead of Gaidel. The awakened Leona underwent an uncontrollable 'Riot of the Blood,' and in the process, she personally killed her biological parents, Gaidel and her mother. Following the shocking tragedy, Leona suffered extreme trauma and sealed her emotions and memories of that time deep within her heart. After the incident, Heidern, the commander of the mercenary group, took the orphaned Leona in as his adoptive daughter. Heidern taught Leona his own assassination arts and martial arts, and Leona grew into a core soldier of the Ikari Warriors through her outstanding combat talent.

Leona has lost her sense of self, dominated by the blood of Orochi. Because her deceased father was one of the Orochi Hakkesshu, she is also a descendant who inherited the blood of the Orochi clan. As her sealed memories resurface, the Orochi blood goes berserk. Her normally blue hair turns red, and her eyes lose their pupils.