Granrodeo’s artist comments can be found here.
Kodansha will be releasing a special 「Ahiru no sora」 mook featuring interviews about the show and charactrers with Kiiyan, Kaji Yuuki, Konishi Katsuyuki, Miyano Mamoru and Uchida Yuma.
Title: 声優長語り コエビト TVアニメ「あひるの空」
Release Date: November 13, 2019
Price: ￥1,430 (tax included)
Hominis has a short interview with Kiiyan and e-ZUKA, where they chat about the Lantis Matsuri and answer a few other questions. We learn that Kiiyan thinks of karaoke as exercise for his voice, and had recently gotten into doing plank exercises. (hopefully he can get back to that after he recovers).