"Then you need to reevaluate what you're really worth." Then again, he's one to talk considering the way he only places value on people on whether or not they're a good person.

"You got it. Food and drink taste like ash to Sunai." He pauses before he answers the third question. "Yes, but not like a person does. I won't die, but I will lose control, and kill every person I can find until I'm not hungry anymore." So, yes, it's a good idea to keep him well fed for the sake of everyone around him.