I totally think this dude is an assassin who stole stuff off a legit isekai'd customer service rep and memorized that phrase to pass as a 'wondrous foreigner'.
Probably killed the poor person that stumbled into a strange land too.
I hope this super surprise plot twist resolves quickly sigh.
Why do I feel like the story is gonna frame this relationship as the MC is such a bland meek moeblob even the woman hating duke doesn't fear her and calls that "love"?
Wow such romance, much feels, I totally ship it. /s