Artist. Good at pixel art.
Japanese name: 光川 なつか or ヒカリカワ ナツカ (Hikarikawa Natsuka)
Site name: B.A.D.
Very old site name: Blood And Dark
https://www.pixiv.net/users/159601
https://www.pixiv.net/stacc/natsuka_h
https://twitter.com/natsuka_h
https://twitter.com/natsuka_night
https://twitter.com/natsuka_ori
https://twitter.com/intent/user?user_id=36674860
https://twitter.com/intent/user?user_id=2180203476
https://twitter.com/intent/user?user_id=3151579704
https://www.tinami.com/creator/profile/29627
https://badfactory.tumblr.com
http://twitpic.com/photos/natsuka_h