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...?!
caused some kind of 
disaster that left that scar.
fürchterlichen Katastrophe
vor fünf Jahren.
causaron algún gran desastre que dejó eso.
causó algún gran desastre que dejó eso.
ou bien quelqu’un d’autre.
hanno causato un qualche cataclisma
che ha prodotto quel cratere.
causou algum tipo de desastre
 que deixou aquela marca.