While Aster was indeed surprised at the sudden interference of the purple lightning princess, while looking so "fierce" Aster found her cute instead of dangerous, because in his mind, she was still too green to throw him out of balance.
"I don't mind having miss Valentina join the sword spar, as a special "service" for our public, however, I need to explain the basics first", calmly said Aster.
And in case you wonder why he specifically mentioned the previous, that's because Valentina approached with a sword in her hand and that fired up expression on her pretty face, in other words she was ready to charge at Aster and Agnes right away, which is amusing considering she is the responsible one among the three Fey princesses, Aster knows about as of current.
