Artist, (former) doujin creator.
Japanese name: 乃藤 悟志 (Naitou Satoshi, usually styled as "Knight O Satoshi" or "Knight ∅ Satoshi")
Circle name: ウェブ乃藤 (WEB KNiGHT ∅)
Doesn't seem to use these names or make doujin anymore
Currently goes under the name kirihalla:
Previous works by him can still be browsed here:
https://www.pixiv.net/users/218983
https://www.pixiv.net/stacc/chepaction2d
https://twitter.com/CheapAction2d
https://twitter.com/intent/user?user_id=1035878289670205440
https://nijie.info/members.php?id=2481
https://pawoo.net/@chepaction2d
https://sketch.pixiv.net/@chepaction2d
https://www.dlsite.com/maniax/circle/profile/=/maker_id/RG15199.html
https://b.dlsite.net/RG15199/
https://www.doujinshi.org/browse/author/4042/
https://www.pixiv.net/stacc/via00
https://twitter.com/knight0_satoshi
https://www.facebook.com/Knight0Satoshi
http://webknight0.sakura.ne.jp
http://www.dmm.co.jp/digital/book/-/list/=/article=author/id=245062/media=comic/
http://webknight0.hp.infoseek.co.jp
http://twitpic.com/photos/knight0_satoshi
