It’d be extremely funny to answer with one from the periodic table, and even funnier for that answer to be something like fluorine… but I will refrain.
Let’s see… I’ve certainly been fey/fairy, but I don’t think I’ve ever been fell. Not sure what that would entail, but possibly very frightening. Probably never been a radiation creature either, but that’d be extremely dangerous. These aren’t part of any particular elemental system, by the way, I’m kinda just saying shit.
I don’t think I’ve been a blood thing. Or a glass thing. Or an acid thing, or a base thing, or a salt thing, or a playing cards thing… When you start throwing in weird elements like these (which should be “immediately” imo) there are suddenly lots I’ve never been.
This is a good ask. Really gets the brain going. Thanks!