Promise
It all happened so quickly. Saix just seemed to appear out of nowhere (which he probably did).
Kairi tried to struggle, to get away. She had even resorted to biting.
But it was no use.
As Saix pulled her away, she called over her shoulder, "Promise me that you'll look out for him! And make sure nothing happens!"
As she was led into the portal, she could have sworn she heard the redhead answer, "I will."