Hm, was that a human approaching? Blues hadn't seen them before, at least not the last time he visited the place his brother was holed up in. They didn't look threatening so he didn't think much at first. But he never was to let his guard down so he'd study them for a bit before takign action.

Once he was noticed they didn't seem to be doing much but searching, he called out from the shadows.

"You seem lost. Looking for something?"