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...?!
I don't need your help, Illya-oneechan!
Auf deine Hilfe bin ich
nicht angewiesen, Illya-oneechan.
No necesito ayuda, hermana Illya.
No necesito ayuda, hermana Illya.
Pas besoin de m’aider,
mademoiselle Illya.
Ce la faccio da sola, sorellona Illya!
Eu não preciso da sua 
ajuda, Illya-oneechan!