The winter season to be exact
The official website for the anime adaptation of Girly Air Force has revealed the main cast and the season when the anime will premiere, which is, as said above, on WInter 2019.
From the cast we have:
-Ryota Ohsaka as Kei Narutani
-Youka Morishima as Gripen
Anime News Network describes the story as follows:
“In the novels’ story, mysterious flying creatures known as Zai suddenly appear, and in order to fight the creatures, mankind creates fighter aircraft called “Daughters,” as well as the automatic fighting mechanism “Anima,” which are shaped like human girls. The story centers on a young man named Kei Narutani, who yearns to fly in the sky, and an Anima considered to be humanity’s trump card, a girl name Gripen.”
Via: Anime News Network