Einharj paused in his tracks at the confirmation that the fey had possibly seen the previous group. "Well, hide and seek does seem fun," he said, as he began moving forward again. "If we find you, will you tell us about the 'oh-so-serious fuddy-duddies' that you saw?"
Spoiler: OOC
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Sense Motive (on the fey's response): (1d20+4)[7]
Regardless of its response, Einharj will cast See Invisibility and look around for the fey
Perception: (1d20+4)[11]
EDIT: The perception should've been +12, not +4, so the total is actually 19.