Artist.
Nickname: エルティカ or えるてぃか (Erutyka, the artist uses this spelling: "Eruthika")
https://www.pixiv.net/users/826139
https://www.pixiv.net/stacc/l_thika
https://twitter.com/LLL_thika
https://twitter.com/intent/user?user_id=206492216
https://seiga.nicovideo.jp/user/illust/18913453
https://www.nicovideo.jp/user/18913453
https://g4zbxjaf.fanbox.cc
https://www.pixiv.net/fanbox/creator/826139
https://sketch.pixiv.net/@l_thika
https://skeb.jp/@LLL_thika
https://l-thika.tumblr.com
https://www.pixiv.net/stacc/reisenn-furanndo-ru_s
https://twitter.com/L_thika
https://twitter.com/eruthika
