Castiel is probably his favourite angel from all of the Supernatural cast. He seems to be the most reasonable of the bunch, as well as the most balanced. Of course, that just worries Uriel more about the sort of angels he is dealing with. He is even more fond of Castiel after he helped watch over Uriel until he recovered.

Uriel has mixed feelings about Lucifer. Much of the time they get along well, but ruining Paradise is something Uriel will never likely forgive Lucifer for. He feels a bit more compassion and understanding, now knowing Pride, the same vice Lucifer suffers from chiefly.