Bazett's barrier was supposed to prevent surprise attacks from the dolls, however Illya finds a little girl, Erica, sneaking into their school. For some reason Erica calls Illya "Onee-chan", and the two of them quickly hit it off. Meanwhile, a man claiming to be Erica's father appears. He seems kind at first glance, and while he came to pick up Erica, he's also...?!
Oh, I just found her to be a 
very mysterious person.
Hm?
Parece una persona muy misteriosa.
Parece una persona muy misteriosa.
Je la trouve drôlement mystérieuse.
Non so, quella ragazza mi convince poco.
Ah, é só que eu acho que ela é
 uma pessoa muito misteriosa.