All the characters in the fan made pic are official characters. They are fan art of official characters designed by huke.
huke created these characters:
* Dead Master
* Black ★ Matagi
* Black ★ Devil Girl
* Black ★ Gold Saw
* Black ★ Rock Shooter
* Insane Black ★ Rock Shooter
You can find them all on danbooru.
EDIT: Oh and I should link huke's blog:
http://huke.blog.shinobi.jp
His original characters:
http://huke.blog.shinobi.jp/Category/9/