Yes. [That's a more straightforward and direct answer.]

As you're probably aware, Ryuko and Athena live together. Knowing that Ryuko is a dangerous girl, but that she cares deeply for Athena, she and I came to the agreement that they could remain together so long as she did nothing to put Athena in harm's way.

Therefore, Ryuko informed me once this enemy from home arrived, and entrusted Athena to my care for a time.