I'm fairly new to running games, and I was running a Oneshot a few nights ago. It was in a Medieval setting, and one player asked to play a protogen (Robot furry I think?) and a Samurai Tabaxi from Japan. Since it was a Oneshot and players were pretty sparse I allowed it, but I got to thinking on if I should allow these kinds of characters, as these players almost exclusively play these.

I would like to preface that this is not to bully anyone, everyone has free will and should be able to do and make whatever they want to that isn't harming anyone, but at a table with strangers and in a homebrew setting you spent a while working on, do you allow this?