I really like your work, the proportions and mood is energetic :)
However, i have some advice to make it even better:
1. Although the characters are the main focal point, you could really push some values in these paintings (the beast has much better ground values)
2. Regarding the beast, i get it that it's a wild animal, but even in nature there are some patterns pleasing to the eye, so don't try to make horns so chaotic looking (i have a feeling it's not very useful in fights due to it's shape).
3. Also, try pushing some more highlights on the armor of and cloth of the characters (by doing some material studies and light affecting it) , it will make your work really pop out more.