You were the only one who stood up to Kai about the inhuman treatment towards Eri. Normally defiance like that was punished with—at least, one of your limbs being blown away by him... instead he kept you locked up. He didn't find it in himself to torture you like that, so instead he tormented you. Lucky you, right?

"I've been told you have been refusing to eat?" He asked patiently, crouching beside you, looking at the untouched food trail. "You could be grateful to be alive and eat your food."