Sephiroth pauses a moment, but accepts this unfamiliar information and these unfamiliar names without too much trouble, after that brief delay. Somehow, it all makes sense to him in the dream. "Was it really so bad?"

He hesitates, never one to advocate less training, under usual circumstances. "The answer to your problems could be training more, if you're having trouble." If she's able to train with Mako or Bolin (whoever they are), then he doesn't see why she can't work with Tenzin.