Shikoku

Shikoku serves as the strategic mastermind of the oni faction 'Hachirajin,' taking the appearance of a girl whose hair tips are adorned with snake heads. Despite pursuing the annihilation of humanity as her ultimate objective, she harbors a deep fascination with human civilization, frequently engaging with smartphones and video games. Known for her talkative nature and sadistic streak, she excels at calm observation and devising elaborate plans, functioning as the organization's indispensable tactical brain.