Even after they had become lovers, Kuukaku knew her girlfriend still feared that she was merely a fleeting plaything.
Irregardless of all the whispers they shared, Soi was too hurt; broken by Yoruichi. For she, too, had promised eternity, love, and the entire world to Soi.
Kuukaku hates her friend for that, not understanding how she could give up such a treasure for something as ephemeral as freedom.
As Soi clings to her, Kuukaku dabs at the dried tear streaks and makes a promise.
She vows that she will never break Soi the way Yoruichi has.