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...?!
but they might fend off surprise attacks.
Vor einem Überfall schützt uns
das womöglich wenig …
Pensé que evitaría ataques sorpresa.
Pensé que evitaría ataques sorpresa.
Ça évitera une attaque-surprise.
Servirà ad avvisarci di attacchi a sorpresa.
mas elas ajudariam a 
evitar ataques surpresa.