Seivarden actually managed to hold back her first reaction, which was that the suggestion that she even might be was a bit insulting. He probably didn't know better.

"No, I'm from another universe with far more advanced technology where we avoid killing planets and ruining good tea."

Ah, killing planets. As soon as she had said it she realised what it could mean. After a pause, she added:

"Killing planets is... generally frowned upon."