In my childhood it was just about dressing up, so I remember my Mum dressing me as a Japanese Geisha, Paddington Bear, an alien, my brother as a Viking or a pirate- her only rule was that she had to do the costume with what she had at home (the Geisha was my Dad’s silk dressing gown!).
But I get the sense that these days costumes tend to be either spooky or a pumpkin, so Zombie Geisha would be OK but not trad geisha.
My DS is two, I don’t really want to put him in anything too gory, and I’d like to dress him as something he’d recognise, like a zoo animal or a Twirlywoo or something. Not a Zombie Twirlywoo.