[He could choose something along the lines of 'who can eat all of a meal Yuuki makes and actually enjoy it,' but he already just knows that will get around to Yuuki before it could even happen. (He's really not that mean, though, in any case).]
You really think you'll beat me?
[Seriously. Does she really? Although he also doesn't doubt her.
He'll just continue meeting the targets with ease, still not looking at them. He's acting more cocky than she's likely seen him as. (All in good nature?)]
Well I can't imagine it ever being my Master or Kaito.
[Who obviously did teach him, but he also was a prodigy from the start. He does wonder what they're up to and how they're doing, still, from her time.]
There isn't exactly a need to teach a pureblood [or a vampire in general] how to shoot a gun.