Artist. Name readings are best guess.
Name (1): 平瀬 なり子 (Hirase Nariko) or 平瀬 なり (Hirase Nari)
Name (2): 藍原 (Aihara) or 藍原さん (Aihara-san)
Name (3): 封筒 (Fuutou)
Site name: HUMANITY
https://www.pixiv.net/users/2555673
https://www.pixiv.net/stacc/fuutou1997
https://twitter.com/shizimi_asr
https://twitter.com/intent/user?user_id=878834494312136704
https://seiga.nicovideo.jp/user/illust/18855091
https://www.nicovideo.jp/user/18855091
https://pawoo.net/@fuutou1997
https://pawoo.net/web/accounts/408285
https://sketch.pixiv.net/@fuutou1997
http://piapro.jp/fuutou928
https://ameblo.jp/fuutou9928
http://twpf.jp/fuutou9928
https://twitter.com/fuutou9928
http://twitpic.com/photos/fuutou9928