I’ve realized something about Coran while rewatching a few episodes with my brother.
He barely ever uses the Paladins and Allura’s proper names if he can help it.
He’s called Pidge ‘number five’ on numerous occasions, and mostly calls Allura 'Princess’.
When adressing them all, he calls them’ Paladins’.
There’s not much evidence for this theory of mine, but I think that Coran does this because he doesn’t want to get too attached to the Paladins. Last time he did, they we’re all destroyed.