A high school student in the Mihoshi Academy Pilot Training course, Alto Saotome is often mistaken for a girl at first glance because of his long hair and fine features. He was even give the nickname “Hime” which means “Princess”. His good looks were revealed to have been inherited from his late mother, Miyo Saotome, who was said to be a considerable beauty.
I think the cosplayer is Stay, but the photo isn’t big enough for me to confirm. Not to mention the fact that I’m not very good with faces! Thanks to Danielle for sending this in!