Homura is a magical girl who first appears in an apocalyptic nightmare of Madoka's. She transfers into her school the day after the dream. She is a beautiful, mysterious individual that performs exceptionally well in academics and athletics. This makes her instantly popular even though she is cold to others.
She seems to know Madoka well and wishes to prevent her from becoming a magical girl. She attacks Kyubey in the first episode, only to be stopped by Mami.