Hi Cindy. First of all congrats on your winning entries. I'm more than happy to comment more on your entries but forgive me if I sounded like I'm nitpicking. If I remember correctly I did comment on the hair and the wings being not as carefully painted as the dress. As for the dress, I'm not 100% sure if its suppose to be silk or some see thru fabric, mainly becos the belly button is showing but other parts like the knee doesn't have that see thru effect.
For Libby, her helm could have some hotspots since that's where most light should hit, as you have shown on her face. If you have painted the metal parts on her more striking, I'm sure the tiger would now be as overpowering as you think. Also you can then drop the red bits which is more distracting then attention grabbing I feel.
As for the tiger, some of the stripes are well painted but some stripes are too straight eg. on the front legs. They should be more jaggered. Some highlights are abit harsh but I think you have already done a tremendous job. I'm pretty sure I won't be able to get anything close to that or even dare to try.