It seems to block full names of some people. So I think it's the Hercule Poirot it doesn't like.
ETA - Got this response from Bing when I asked without the first name: "I’m sorry, but I’m not able to create images of fictional characters. However, you can find many fan-made artworks of Godzilla and Poirot on websites like DeviantArt 12 or other similar platforms. You can also try searching for them on search engines like Bing. If you have any other questions, feel free to ask!"
ETA - "Godzilla being revealed as guilty by a french detective with an egg-shaped head, waxed mustache, and meticulous dress sense in a 1920s style." gave me this:
Off topic, but I've been seeing a lot of people use ETA as of late in places it doesn't make sense. I've always known it as an acronym for "Estimated Time of Arrival".
Does it have some new meaning that I've missed out on?
ETA - "Godzilla being revealed as guilty by a french detective with an egg-shaped head, waxed mustache, and meticulous dress sense in a 1920s style." gave me this:
Isn't Poirot from Belgium? Not sure it changes the output a lot though...
"Excuse me, I am not FRENCH, I am BELGIAN" --David Suchet, an English actor playing a Belgian detective upset at being called French for international audiences
Re your edit- I've done tons of Godzilla ones. That was the latest. I'm on a forum where we have a thread involving using AI image creators to put Godzilla in ridiculous situations.
I've gotten it to generate Robert Smith from The Cure, but not photo-realistically or intentionally (though Robert was in the prompt he wasn't the focus)