Artist, illustrator.
Artist name: KA2 (reading is given as Katsu)
Name as an illustrator: 克 優希
Circle name: 蒼丹色
Site name: あとりえ蒼
https://www.pixiv.net/users/10337
https://www.pixiv.net/stacc/ka2
https://twitter.com/atelier_BLUE
https://twitter.com/intent/user?user_id=214894673
https://fantia.jp/89cbd15564
https://fantia.jp/fanclubs/477420
https://seiga.nicovideo.jp/user/illust/3747918
https://www.nicovideo.jp/user/3747918
https://ka2.fanbox.cc
https://www.pixiv.net/fanbox/creator/10337
https://sketch.pixiv.net/@ka2
https://www.tinami.com/creator/profile/1525
http://mixi.jp/show_friend.pl?id=16145956
http://www.amazon.co.jp/s/search-alias=books-jp&field-author=克+優希
http://www.doujinshi.org/browse/circle/18629
http://doujinshi.mugimugi.org/browse/circle/18629
http://p.twipple.jp/user/atelier_BLUE
http://twitpic.com/photos/atelier_BLUE
