Welcome to HBGames, a leading amateur game development forum and Discord server. All are welcome, and amongst our ranks you will find experts in their field from all aspects of video game design and development.
The sprite could use some shading in areas like the bandana and from under the shirt (where the lower part of the torso is), as they cast shadow. Like everyone here has said, that concept is hideous.
Well, the angle of the sword in the second and fourth frames seems a little awkward to me. Just taking a quick look at it, so I haven't looked in detail at the shading. But that's what jumped out at me.
Thanks. The guy I'm making this project with doesn't agree with you, though. The design for the character was relatively easy. I based the costume on a character from one of the manga my mate makes. I tried to add a modern spin to it but I think I failed : /