Oh, heck, it just occurred to me now that maybe Keldor and Keith can try to get some CR going; mainly bonding [if possible] over the two of them being both half humans. I think Keldor would "get" that kind of thing without needing it being explained too much, and vice versa.

It kind of helps that their non-human heritages are both seen in a negative light in their respective canons [people tend to not like either Gar or Galra—deservedly or not], so there'd be mutual understanding there, too.