Artist.
Japanese name: ぴおねる (Pioneru, the artist uses this spelling: "pioner")
https://www.pixiv.net/users/5623006
https://www.pixiv.net/stacc/ergohuman
https://twitter.com/pioner18sh
https://twitter.com/pioner_sh
https://twitter.com/intent/user?user_id=248943614
https://twitter.com/intent/user?user_id=780295311994462208
https://www.deviantart.com/pionersh
https://sketch.pixiv.net/@ergohuman
http://privatter.net/u/pioner_sh
https://marshmallow-qa.com/pioner_sh
http://mstdn.jp/@pioner_sh
