Medusa the Witch - The One Who Possesses a Great Evil Soul?

Just when Maka and Soul are about to be killed by Chrona, Stein and Death Scythe appear to save them. By combining their strength, the duo have some trouble against Ragnarök's ability to transform every bit of its blood into a weapon, but in the end Chrona is defeated. The witch observing the fight reveals herself and rescues Chrona, while the others return to Shibusen in order to treat Soul's injury. Stein tells Maka that the treatment was successful, but he confesses to Death Scythe that Soul's body was infected with a demon weapon's blood, and his future is uncertain. In the end, Maka is comforted by Tsubaki and Medusa, a teacher in the school who is in fact the witch who attacked them.