Raising her hand Angelina said, "The diary takes someone unaware of it being a Horcrux that can control them. With that the diary is able to take over the person in a like way they know they don't mean to do what they do for real, it just makes them. With Ginny Weasley the diary made her be the physical person to open the Chamber of Secret leading her incontrol on the heir of Slytherin, Tom Roddle." that was the best she would explaine the diary, she hoped she was on the right track.