Hi caos 
I think your work with a pencil is very nice, very good strokes and studies!
On this watercolor practice… you should not do this anime style strokes for the nose … this destroys your attempt on getting it real. Just place shadows for this strokes and it will be better.
I think you should leave this anime style behind you and try to do this anime character rendered realistic. I think this would be better than trying to give them a realistic color but with the typical anime strokes…
Do you know Gabrielle dell’Otto ? He is an great artists, he takes the marvel superheroes and renders them with a lot of realism. I think this would be something you should try yourself 
Keep it up!
Thomas


























