If Ales is looking for more serious people, Sephiroth is about as serious and not!goofy as they come. In fact he could be described as over-professional and is more than happy to have others believe it too. He has a passing interest in science, though moreso since the crystal stasis became a thing, needing to figure all of this out is very important.

Despite the fact he still thinks this is all a coma-dream.