Complete Monster: Tom Riddle, aka, Lord Voldemort. Anyone that's read the series already knows this, of course, but half the point of this story is to highlight what an utter bastard he is. His abuse and manipulation of Ginny, combined with his hatred of Muggle-borns and Muggles, make him disgustingly evil, not to mention terrifying.
Crowning Moment of Funny: Despite this being a very dark story, there are some moments of humor here and there. Tom's utter bafflement that Professor Binns is still teaching in particular is funny. You can practically see him thinking, "What."
Fridge Horror: Part of the reason this story works so well is because something along the lines of this must have happened in canon.
Heartwarming in Hindsight: All of the things Ginny said about wanting to be closer to Harry becomes this when you realize what happens at the end of the series.
Jossed: After this was written, it was revealed by Rowling that Ginny's name is Ginevra, not Virginia.
Mind Game Ship: The basis of Tom and Ginny's relationship, if you can call it that, is Tom manipulating her and molding her into the servant he needs. It's suggested that Ginny had a crush on him, but how true it is depends on how you view things.
No Yay: The fic is dripping in horrifying implications for Tom/Ginny. Ginny appears to have a crush on him, and Tom seems to be exploiting it and outright encouraging her feelings for him. Ewww. Very much the intended reaction.
Squick: The hints that Ginny is falling for Tom, and Tom encouraging it. Quite a few of the scenes where he possesses her read almost like rape or molestation.
Tearjerker: The whole thing, from start to finish. Ginny just wanted a friend.