duende \doo-EN-day\ noun

I'm intrigued by this one today, because it's something that's brought up in actor training: there's always that quality in an actor that is unidentifiable.  You just can't stop watching them onstage.  Not because of looks or even what they're necessarily doing sometimes, (although what they're pursuing onstage hopefully comes along to HOLD the audience's attention once they have it), just a personal magnetism that they naturally possess.