Belinda waits a moment to see if he'll say anything else. She can't really determine if he's this taciturn with everyone, or if she really is bothering him. At least he doesn't appear to be a mage. When she asked Rion about his family, he shot an ice spell at her and she got frostbite. She decided she didn't really like him much after that. Words like "None of your business" work so much better than hurting someone.