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]]