Jon, you should probably try to go with a different version of Kain rather than the bright teal version on snes. If you think about it, there is probably a good reason why they decided to change his bright colours into darker colours in subsequent versions.
The colours you are using at the moment are really saturated, and could probably be toned down a bit. And man, why are you using the Dark Knight sprite from wotl as a base?
, that's a nightmare waiting to happen, the creator of those sprites did a pretty bad job of them so its really not wise to use them, try something else.
The helmet doesnt really scream Kain, you gotta make it look like his helm rather than the lancers somehow, whether that be changing the the dragon fins/wings at the back of his helmet or changing the general shape of the helm or both.
Another thing that is happening is overdoing detail. I mainly think that is to do with you using the Dark Knight as a base once again, the Dark Knight is notoriously bad for its over detailing, messiness and terrible palette. And I think that is influencing how you are going about it. However, if you were to look at the newer versions of Kain you would also see a ton of detail, which is why you need to simplify things as Lijj mentioned you should do with the belt. The same thing should really be done over.
The hair at the back... Erm, I think it shouldn't be that visible really, and the colours you are using for the blonde hair are fairlyrety saturated making it look bad, in my opinion.
Well, that is probably what should be done for now. (p.s. you said you wanted crits and here they are