Interesting. Willow was certain she'd seen a glimpse of fangs when he'd smiled at her, but they were gone as quickly as she'd spotted them. Clearly he wasn't a vampire - she could sense one of those without any trouble at all - and he didn't seem to be very demonic either. That landed him in the 'other' category, which meant he was definitely someone to notice.
Her own lips curved upward a little higher, her amused grin almost eerie given the lack of emotion in her eyes. There was something else about this man that had her interested. A heartache, cleverly hidden and deeply disguised, that haunted him. A driving force perhaps, a reason for him being here? Willow couldn't say for certain, but she decided she wanted to find out.