No, just a bit mythological. Definitely belongs to planet Earth, does Santa. That's why 'e needed the upgrade, see? One planet, 'e could manage just fine - but after the 23rd century or so, when humans started spreading out? Poor bloke 'ad way too much on 'is plate.

[At close quarters, Iris is, perhaps, the tiniest bit wary of not being believed. It's almost vestigial, a little throwback reflex, because she trusts Cain absolutely to know when she's embellishing or plain inventing. She isn't, not this time; but this is half the reason Iris does occasionally spin bullshit. Too many people wouldn't believe her truths.]

Good thing 'e ran into me. Like it or not, Christmas is one of your planet's better exports.