haunting

ghastly, ghostlike, ghostly, ghoulish, spectral

bizarre, curious, odd, outlandish, outré, peculiar, quaint, queerish, quirky

unaccustomed, uncommon, unusual

metaphysical, preternatural, supernatural

enigmatic (also enigmatical), inscrutable, mysterious, puzzling

dreadful, fearsome, horrible, horrifying, terrible, terrifying

patronizing

attending, taking in

infesting, invading, overrunning, swarming

calling (on or upon), dropping by, dropping in, popping (in), running (in), stopping (in or by)

camping (out in), sojourning (at), staying (at), stopping (over), tarrying (in)