I've had this question asked before, actually! It's all subtextual, and therefore open to interpretation, reinterpretation, death of the author, etc; but my intent was that with what figurine you get not being random, with one's figurine having a magical intent and purpose hidden behind the blind box, what it does to you is never something that doesn't apply to you, if the vague language makes sense. Not necessarily determinism, not necessarily destiny, but... you don't get what you get for no reason. What this means for"Jeremy" is left open-ended, but there is an implication it didn't come out of nowhere from the figurine itself. Again, I'm being super vague about all this because I quite enjoy this vagueness myself, it's stuff I like to write about in that way, but if you'd rather be reassured by a clear-cut answer, then yes, personally I think Jeremy was... whatever the egg equivalent for plural is. All of the resulting headmates do take traits from them, and once again, that does imply stuff about the before.
