Have some ideas:

 * Lovely Magnet Miku: https://yande.re/post/show/205657/
 * Ama no Jaku Gumi: http://danbooru.donmai.us/posts/1037598
 * Gumi and Rin: http://danbooru.donmai.us/posts/1285445
 * Kagiyama Hina with guns: http://www.pixiv.net/member_illust.php?mode=medium&illust_id=28176715
 * [[attachment:fate-girls-in-black.jpg]]
 * http://danbooru.donmai.us/posts/1419736?tags=dango
 * Dat Grading: http://nikkijun.blog.163.com/blog/static/10513096201361210736263/

Blood effect brushes:
 * http://all-free-download.com/photoshop-brushes/blood_marks_brushes_177946.html
 * http://all-free-download.com/photoshop-brushes/shad0ws_blood_brush_set_178027.html
 * http://jamesrushforth.deviantart.com/art/Shad0ws-Blood-Brush-Set-19982524