Huh... Xigbar was certainly at the edge of his seat armrest during the explanation, tapping his chin as he heard Obi-Wan describing what had gone on. And, more importantly, that the kid had bought his off-the-cuff answer.

It was that last bit, about the 'abilities and philosophies', that had Xigbar curious. Before he'd been a Nobody, Xemnas had been a researcher... but a researcher without his memories. Had his Superior been a member of one of those groups, or some equivalent? It would explain the severe attitude, at least.

"I'm listening; what kind of abilities and philosophies? I'm guessing they didn't gather around campfires and sing songs."

Xigbar was a little curious about the Sith, but that could wait for another time. For now he was just intrigued enough to keep listening.