I'm secretly hoping that at some point Sephiroth might learn that Chrom is big on the refugee front at the same time as being involved with the military. That'd raise a few eyebrows for sure since Hera was their enemy until, well, it was conveniently crystallized. Sephiroth is almost too prejudiced over the idea of Heroes helping Herans when to him they've been the cause of so much loss/destruction already.

He'd not be too much of a fan of Chrom's overwhelming goody-two-shoes-ness but I guess swords might be a common interest :p