Sifu The Artist - Tumblr Posts

Sifu: Kuroki's true personality

Kunai Kuroki is the 'real' personality, i.e the one who is 'alive':

While Staff Kuroki is the twin sister who 'died':

Kunai Kuroki is predominantly in mourning colors and her eye makeup is streaked from crying over her twin sister's body.

Staff Kuroki is neat and dressed up for her own 'funeral'.

Kunai Kuroki's fighting style is more aggressive while Staff Kuroki fights defensively. Which possibly reflects their respective roles as murderer and victim. Kunai Kuroki may be the sister who lived, but she allows the dead sister's personality to be the dominant personality. Probably out of guilt exacerbated by the magic artifact she took from her Sifu.