Artist.
Japanese name: あるか or アルカ (Aruka, the artist uses this spelling: "alka")
Circle & site name: あるかねっと
https://www.pixiv.net/users/263118
https://www.pixiv.net/stacc/alka1923
https://twitter.com/alka_p1
https://twitter.com/intent/user?user_id=1351607318
https://seiga.nicovideo.jp/user/illust/8072068
https://www.nicovideo.jp/user/8072068
https://pawoo.net/@alkap1
https://pawoo.net/web/accounts/167030
https://alka.fanbox.cc
https://www.pixiv.net/fanbox/creator/263118
https://sketch.pixiv.net/@alka1923
https://skeb.jp/@alka_p1
https://www.tinami.com/creator/profile/48067
https://alka-p1.tumblr.com
http://alka01.blog.fc2.com
https://www.pixiv.net/stacc/arai3648
http://p.twipple.jp/user/alka_p1
http://twitpic.com/photos/alka_p1
