The caterpillar in Alice in Wonderland is totally a Vorlon.
He’s always asking “Who are you?”, has a short temper, speaks cryptically, and when he offers help, he won’t explain it. He relies on an alternate atmosphere supply. And in the Disney version, he even sheds his external skin and reveals himself as a winged being.
I don’t think he was ever named, but I think I should call him Kosh.
A bit of fun is that the Disney version of the caterpillar was voiced by Richard Haydn, who played Herr Falkstein in “Young Frankenstein” and Max Detweiler in “The Sound of Music.” One of my favorite roles was in “The Twilight Zone” episode “A Thing About Machines” in which he gets paranoid that all mechanical items are out to get him — his typewriter, his TV, his electric razor… and it turns out it’s all TRUE!