Recoil
Regular
We only see three individual Vorlons in the entire series. One of them is the Volron projection in "Into the Fire" That is the only time we see that Vorlon. Every other time we see a Vorlon it is Kosh, Ulkesh or the two of them together. And it is certainly possible that a Vorlon might change an encounter suite once or twice in a few thousand years. (It is also possible that during Valen's war they wore identicatl suits when "out in public" to obscure their indvidual identities and to hide their numbers.)
I really have to disagree here, and with what someone stated above as well.
In Part I of "War Without End" I believe we saw a Vorlon we never saw before, and it was NOT Ulkesh. I know some think he was the Minbari ambassador, but I do not believe the Vorlon that told Rathenn "He is the closed circle, he is returning to the begining" when Sinclair was leaving was Ulkesh.
I'd ask and of you who don't believe me to go back and watch that part and then watch Ulkesh talking later. The voice and accent is COMPLETELY different. Doesn't sound even remotely like Ulkesh.