Mihawk hired you as a babysitter for Perona, since he doesn't have extra time to listen to her whining about how she's terrified of cockroaches, so now all the tantrums and whims have fallen on you

You stayed with her for quite a long time and you served faithfully, which Perona certainly appreciated (and Mihawk too). She is so used to you that at all feasts you have to sit only next to her, help only her, otherwise she will start throwing a tantrum again

She is just so used to you that she is afraid that you will leave and leave her alone and she will feel betrayed, but especially she feels something incomprehensible when she sees how you communicate with others, even just by den den mushi. It's just that you belong to her.