She is a Dragon Knight who turned her love toward Karasu to hatred due to his betrayal. She has hatred for Haruka as well for causing Karasu's betrayal, seeing her as nothing more than an item. Her wanting to understand forces Kosagi to cuts her pipeline so she can stay to see Karasu die. But in time, she became to understand the truth and eventually returned to La'cryma to destroy the main computer to halt the invasion. Kosagi's spin weapon appears as a bow-like device bursting from her right arm and can fire energy blasts. Kosagi is Japanese for egret. [Wikipedia]
