Artist.
Japanese name: なつなぎ (Natsunagi)
Idolmaster-related name: なつなぎP (Natsunagi-P)
Old name: 夏薙 たかき (Natsunagi Takaki)
Circle & site name: 水色の夏 (Mizuiro no Natsu, Lightbluesummer)
https://www.pixiv.net/users/46395
https://www.pixiv.net/stacc/air-1000thsummer
https://twitter.com/asame_poke
https://twitter.com/momyument
https://twitter.com/intent/user?user_id=301777254
https://twitter.com/intent/user?user_id=710869271140634624
https://seiga.nicovideo.jp/user/illust/1023810
https://www.nicovideo.jp/user/1023810
https://pawyj266.fanbox.cc
https://sketch.pixiv.net/@air-1000thsummer
https://ask.fm/momyument
http://lightbluesummer.web.fc2.com
http://www.doujinshi.org/browse/circle/22575/
http://c10011875.circle.ms/oc/CircleProfile.aspx
http://c10048121.circle.ms/oc/CircleProfile.aspx
http://p.twipple.jp/user/momyument
http://twitpic.com/photos/momyument