The series' protagonist. A young arms dealer and the daughter of Floyd Hekmatyar, a global shipping magnate . Belongs to HCLI's European and African Logistics Division. She is physically attractive, with long silver-white hair, pale alabaster skin, striking blue eyes and her trademark smile, which is present even under dire circumstances. She is extremely charismatic and bold, which earned her great success in her business as well as the fierce loyalty of her subordinates. While generally behaving in a bubbly and slightly childish manner, Koko is actually rather ruthless and has been called a 'monster' by various characters. She claims that she sells weapons for world peace, but there seem to be an ulterior motive that she keeps as a secret to everyone except Minami Amada and Chinatsu, who was killed shortly after knowing Koko's secret plan. She considers Jonah a little brother and is very affectionate towards him. Valmet has a crush on Koko, but whether Koko reciprocates the feelings is unknown.