Artist.
Japanese name: 栗原 ケンシロウ (Kurihara Kenshirou)
Circle name: 拳王親衛隊 (Ken'ou Shin'eitai)
He is also a member of Bunjutsu Fortissimo, a doujin circle led by fanfic writer Miura Sairasu. Sairasu often uploads the illustrations of other circle members to his sites/accounts with their permissions. The real artist credits are on his Pixiv commentaries.
Miura's accounts:
https://www.pixiv.net/users/2132505
https://www.pixiv.net/users/3311454
https://www.pixiv.net/stacc/kurihara09083303771
https://www.pixiv.net/stacc/sairasu99
https://twitter.com/kingdomofsteel1
https://twitter.com/sairasu9
https://twitter.com/intent/user?user_id=128683085
https://twitter.com/intent/user?user_id=994877378
https://pawoo.net/@sairasu99
https://pawoo.net/web/accounts/571132
https://bs95tmlv.fanbox.cc
https://sketch.pixiv.net/@kurihara09083303771
https://sketch.pixiv.net/@sairasu99
http://blog.livedoor.jp/sairasu22
