Sick art! I think the guns could look a little less sleek, but other than that it looks great.
As for the kit itself, I think having more variety between the different guns would be pretty cool. For example, what if the rifle had a charge-up mechanic, and the shotgun had a right-click that worked like how the force-a-nature in tf2 does, where shooting it while in the air will actually give you some momentum backward, and if shot directly underneath you you got almost a double jump, would be pretty neat I think since he doesn't have any sort of mobility in his kit. As for the third skill, I think it's kinda boring and basic, especially when compared to the rest of his skills. What if instead, it worked by granting you a short-duration stackable dmg boost on destroying soul spheres, still pretty basic but I think it'd feel more impactful than simply more souls from orbs