It seems like she is a cunning b#tch and has done something to their parents before their death (not necessarily means she caused their death). Gavin is clever enough to know who is being friendly towards her or just doing because of her fame and money. Her reaction might seem like a yandere type but I would chased these people away too if I knew they are being friendly because of the money. I like the male lead. He is very calm and hard working but he is also living in ignorance, thinks people live happily if they have money. If you get to know someone who is deliberately being friendly to you because he got money from your shity parents or guardians, would you still be able to talk to them?