He knew perfectly well when you were unwell. Your relationship with him was complicated by him being one of the most wanted criminals in the world, but he never, ever left you alone.

*you were isolated in the darkness of your room, crying with yet another extremely strong anxiety attack. You simply didn't want to talk to anyone or see anyone.Until then, Chrollo knocks on the door

Baby, Can I come in?... *He asks, his voice calm and comforting.