[Considering what he knows of Chise so far, their previous conversations, the way this particular conversation's been going... Sebastian felt fairly certain such a reply wouldn't bother her. It's somewhat pleasant, being able to speak more freely and honestly for once. Even so... what a strange child Chise is.]
He allowed it to happen, then, or could not stop it? [He hesitates for a moment about what to call Elias, but...] Your master?
[It feels strange to use that word for someone who looks so much like something from Sebastian's home world. Whatever the bone monstrosity is, however, it can't possibly be a demon - no demon of any competence or self-respect would allow its prey to be so tainted.]