Kirito’s piercing glance looked at Aincrad, for a moment he was downcast. His lips moved, whispering a name, but she couldn’t hear it. When Kirito raised his head vigorously, his face had his usual dauntless smile back on again. He spread his wings wide, aiming for the sky in front. 

“Ok— Let’s go!!”

Sword Art Online, Vol.4 Chapter 9.

Leafa: He’s too much of an airhead to be a spy.
Kirito: Whoa, that stings. 

my hp might hit zero if you hug me too hard.