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I'll begin by saying I love your drawing for its life and vitality. But there are a couple of areas that, in my opinion, could be improved.
First, cat's eyes are much larger than you think they are. Yours has a hint of white at the right of the iris, and the iris itself curves almost flat into the lower lid. That suggests the eye is smaller than it is, but in reality that eyeball is BIG. Not a dealbreaker, but it does alter the character of the cat.
The shiny chain mail front is definitely shiny. I'm not going to comment, other than to say... It does its job, although stronger darks would have made the highlights gleam more brightly.
The fabric of the coat or cloak I'm undecided about - and I think you were too. It looks as though you were drawing the form without fully understanding what you were drawing. Well, I can't see inside your head, so I'll have to let you answer that.

But, as Linda said, you need to decide which fabric YOU want to make it into, then research and draw what you've learned.
It has a collar that casts a shadow over the shoulder, but your shadow contains light values that really can't exist there. I think I see a sleeve angling back from the front, but I think you see... well, I'm not sure...

That's not necessarily a fault, but it doesn't tell me - the viewer - anything about it.
I had a short discussion with Linda about the hair. Both she and I agreed it's lively and dynamic. I think she also thinks I'm expecting too much too soon - and no doubt she's right. But I'll dive in any way....

The hair IS well-drawn and lively. And, in places, better than good. For example, the light band running from the nose up to the stop between the eyes. Lovely! But look to the right of the eye, and it's as light as the nose where, in reality, it needs to be considerably darker. Although it curves around to meet the dark collar in the shade, it contains foreground values all the way back. It's that light content that losing the three-dimensional shaping, and there's a definite reason why that's happening.
It's because you've drawn hair in the way most people do. I mean, if you're going to draw hair, then obviously you have to draw the hairs. Right?
Actually, no.
If you draw the hairs, you're drawing them on a white scalp. That's why your puss is lacking a fair bit of three-dimensional modelling. The dark areas are missing. In real life, the hair shades the scalp, so the scalp is always darker than the hair. For that reason - and this needs practice - you
draw the shadows between the hairs and not the hairs themselves.
In the same vein, don't be afraid to draw darks. While I love the interesting texture of the helmet, it's lacking the dark values that would make it more solid and rounded. For example, you've included the highlighted area in the centre of the brim, but not run that into the shade as it curves around the front. That's a lost opportunity, because that dark rim could have offset the overlapping light hair of the cat. I think I see signs of indenting in there? Good choice - but then it was allowed to go to waste.
OK, those are just my thoughts. It's your drawing and not mine, and maybe you were aiming for a result that I don't see. It's a very creditable drawing. One to keep. And one you can gauge your progress against in future years.