The girl was forced to stay on the material plane because Oscar made her suicide about himself and made a deal with Mystic Carrion to bring her back, so he can figure out, if the suicide wass his fault. That's pretty shitty behavior in my opinion, plus, I just don't enjoy the quest, similar to the others I listed above. If you see it differently, suit yourself, Asnka asked, what we don't like and I gave my opinion, no need to get into a discussion over it.
Oscar didn't make her suicide, he didn't matter to her at all, she suicide for her own personal reasons, unrelated to Oscar. She talks about it herself and is angry at Oscar for thinking that he was the reason. About the Mystic Carrion deal - yes, it was a bad decision on his part. Alright, I don't want to argue, everyone can perceive this quest as they like, it was just a clarification about the plot of the game.
