Kirika

Kirika (キリカ): Another Wandering Bōma. She originally lived as a normal girl named Sayoko Tsukikage (月影小夜子) until she learned that she is Wandering Bōma on her 18th birthday, shortly after finding that the man and woman who raised(and protected her for 20,000 years) were really just Skull Monsters. As Tsukikage, was an outcast in school who secretly loved Riki. She is permanently connected to Yamimaru through the "red thread of fate." Cruel and lacking compassion, her resentment of humans stems from her life of being bullied. She is repulsed that the blood running through her is a mixture of human and demon, deciding to call herself a full-fledged demon and throw away her humanity for Yamimaru, resulting in his power-up and her armor. She combined with the monster Armor Bōma to become Armored Kirika. Near the final, she and Yamimaru meets Kirika's true father, a peaceful demon named Kashim (カシム), who tells them of how much he loved Kirika's fellow peaceful, human mother, who wanted for both sides to coexist and this begins to break the hatred of Kirika and causes her to cease fighting. Because she knows the hatred and loneliness that Yamimaru has been suffered for 20,000 years, she wishes him to release his hatred so she tries to persuade him. In the finale, she manages to save Yamimaru and left to live a peaceful life with him, as Sayoko and Hikaru.
 * Weapons: five-pointed ringknife, Moonlight Sword (月光劍)