Well she is a Gold digger because she was in poverty all her life. I called it earlier that she was gonna hold Ngan ransom
I don't even think we can call her a gold-digger. A golddigger only remains in relationships where they can profit from their partner's access to money and/or power.
This girl is pretending to date our guy to force a reaction out of the childhood friend so that the childhood friend will pay her off to leave.
So she's really just more of a con artist.
But honestly, given she did infact get ya boi into shape, and is getting the two of them together, she's sort of a failure of a conartist and more of a match-maker.
Dunno if it's an overall asian thing , but i have seen another korean webtoon where they parodied the 'love interest bribed with money' but usually by like the mother or so like 'stay away from our son' XD
(tho i think my parents did have a viet channel that played kdrama or dubbed or so)
IIRC there is some common-culture story in that corner of Asia about unwelcome suitors being bribed to go elsewheres by a love interest.