Even the ninjas themselves were surprised of Robin casually robing through orochi property. This just tells us how kinemon poorly prepared the first group of straw hats into wano territory, and there's zorojuro botched infiltration in the flower capital as proof for starters. I mean common, tell her why she trying to get Intel in orochi home, to beware of ninjas. It's basic! Even furukoru...... whatever and co were surprised that she will casually explore the castle without taking them into consideration. Which led to one present to surmise that she was a foreigner.

Well Robin's obsession with ponegliffs got the best of her, and probably kinemon did not take that into consideration putting her on this mission. I mean it doesn't make sense that just once Robin finally gets to orochi castle, she gets caught, well by spies of another caliber than her but still.

Well, she can still buy time with her explanations to escape the castle, assuming that the Robin we just saw is a clone, but needless to say her cover is blown, everybody's in the flower capital. I was really counting on Robin. Only Komurasaki at this point can do something.