Yuki is black witch of fire magic. Mai is white witch of ice magic. They're two friends. Yuki is the more vocal of the two. Mai is the quieter of the two, but also seems to believe that she is stronger. Yuki will become enraged if Mai is defeated before her. Mai does not appear to be distressed if Yuki is defeated first, going so far as to call her deadweight. Mai also claims to be stronger than Yuki.