Idk but my first instinct when reading "Greip" is to pronounce it as "Grape". Or maybe because the characters were pronouncing it like that and it didn't bother me.
I'm usually not a big fan of childhood-friends-to-lovers as a trope, but this one is hitting! Goes to show all…
Yess I thought the girl was Danho's kid too. Along with everything else you said, he's also been very low-key and secretive about his personal life. And when Moeum's mum and Seokryu's mum were fawning over him, Moeum's mum seemed to be telling her no, he's not for any of their daughters. Because he told her he has a daughter?