OHOHOOHOHOH Nightingale finally asked the question!!!
Spoiler:
"In the end, are you really Roland Wimbledon?"
Spoiler:
You dirty, dirty old man, what did you even think she will ask?
...to which he replies
Spoiler:
"I am, but at the same time, I am not."
Which to me is a biiiig thing. There is a good possibility that in the future he will tell others his true origin and his story. I hate those novels where the MC is reincarnated but never tells a soul about that, not even to his wife/wives.
And Nightingale was the first to get a clue about who he truly is