I'd say 4+1 points where you can improve:
1. color scheme. The figure feels mostly blue with a yellowish skin while the clothes are mostly black-white (with a hint of purple? feels that way). Somehow it doesn't feel complete + colors on the pic are not that saturated so it's missing a strong focus (can be that the back of the cape is a strong blue and with that the mini works, but on the image it doesn't show)
2. contrast. On the white sash it looks ok, but on the dark clothes and skin the light-dark can be pushed much more. It's actually surprising how much contrast the skin can take and still look natural and good.
3. transitions. Yeah that mini is small and hard to do it, but with the help of a few glazes the transitions can be made smoother. Or just cheat and use dry pigments (they can be used for much more than just weathering vehicles)
4. neatness. I'm not a great fan of black lining or similar things, but some of the areas are washed together and don't stand out as separate parts. Most noticable is the waist area, where the contours of the dark cloth-sash-buckle is hard to differentiate (and a bit of the same issue with the tigh there too), similar with the lining of the ice crystals, they could be improved with neater edges and a less patchy transition,
or the buttons on the upper body (a cheat here: don't use a brush for painting buttons/rivets, but a sharpened tooth pick, makes them much more uniform and easier to paint too)
+1 Highlight direction. It's not a real problem, but you used the GW style general highlighting (recess darker, folds lighter), look up zenithal lighting scheme, where you still do the general lighting a bit, but also make parts that are lower darker and those closer to the 'sun' lighter.
