I'm not entirely sure specifically what 'daftar ost new gisaeng story' is about as the name is a bit unclear. It could potentially be about the soundtrack (ost) of a story related to 'new gisaeng'. Maybe it's music for a drama or a story that has something to do with a new type of gisaeng, which were female entertainers in Korean history.
Andrea Yates was a mother who unfortunately drowned her five children. In the context of the 'Andrea Yates and True Hollywood Story', she is the central figure. Her actions were so extreme that they caught national and international attention.
Well, there could be her grandfather. He might be the one who taught Andrea how to drive the tractor in the first place and is always there to give her advice when she encounters problems with the tractor.
Since we only have the title, it's hard to determine exactly who Andrea Hines is. She might be a public figure, but then again, she could also be a private individual whose story is being told because of some unique event related to the 'Blitz Attack'. It could be that she is someone who has a particular connection to the events that unfold in the story, whether it's as a central character, a key witness, or someone who has been affected in a major way.