In my first run ol' Raphy appeared pretty early because I rushed to Nettie. Speaking to Astarion afterwards, he mentioned his master... despite the fact that my character at that point hadn't even found the blood drained boar yet and thus had no idea he was a vampire to begin with.
Hopefully this is just EA jank, I don't want there to be a possibility for me to accidentally spoil myself on any big reveals later on just by speaking to my companions.