Overall I think you did a fantastic job! You drew his body, especially his muscles and appendages proportional and accurate to Beast as portrayed throughout Beauty and the Beast, and in any other animation he's been a part of.
If there was anything I found to critique, it is specific placement and expression. His left hand is a little large and oddly open compared to his other hand. The toes on his left foot are also a little long. What else I noticed was his face. I feel like his eyes were drawn just fairly too far apart, and for me that made the nose look a little too angular. His jaw however is perfectly poignant (alliteration for the win) and when put into perspective with the rest of his facial feature/upper body and his overall position, you effectively portrayed his vulnerability hidden under obvious strength. Fantastic job, especially for a sketch.