"Yeah," he says, "pretty much literally - I mean, when I need a name on paper or out loud, I use Celosia because that's what grows in my garden, but my actual name is... kind of a psychic impression. Another nymph thing. Lemme see..."

He stands there looking thoughtful for a moment, idly doing tricks with a coin that he wasn't holding a second ago. His aura comes out.

His aura says that he is a god. He glows with the faintest touch of sunlight, and smells like a field of grain on a summer day, and is somehow warm to look at, and he is unquestionably divine. Helpfully, the aura also advertises his friendly regard for people in general (including Lexi in particular) and currently positive mood.

After a few seconds, the aura fades and an illusory nametag floats in the air near his shoulder. It proclaims his template to be Joker and his world to be Materia in the usual fashion, but the name entry is just a smear of vibrant colour, which when looked at with the intent to read produces Celo's name. It turns out that his name was part of his aura, but it's much more intense in the original. (The coin he was fiddling with is also back where it came from, wherever that is.)