Each individual pose, the colors, the art style - There isn't much detail, but that's what makes it interesting. It is very appealing to the eye. You can see the personalities of each character just from the way they're drawn. It's amazing!
I love your art work, and I've learned a lot from it.
This might be a bit rude, but could you please do a tutorial on how you pose your characters? The proportions fascinate me and I would love to learn more about it.
I think you should do a graphic novel with these characters, something in the style of Neil Gaiman's Sandman/Endless ([link])! And maybe with a hint of Nier too, they have that rough papery feeling to them([link]).
Start with Hunter Assassin to hook us in. His story looks like it's going to be the most chaotic. Then proceed to Chaos Enigma. He looks like he would have some sort of mind blowing plot twists. And finish it with Sword Master, as he appears to be the one with the most back story. But, he also seems like his story will be an calmer one. And thus, the trilogy starts with a big bang, and keeps us hooked with all the twists and finishes us off on a soft, but unforgettable note!