Here are the character proportions I've been working on -
I think I may have to play around with the proportions a bit more to make these slightly less generic with things such as longer legs and slightly unrealistic muscles. I think that the character needs to come across as quite strong but still very agile much like the prince from Prince of Persia.
I am liking the monstrous muscularity of my villain but again to move away from generic design maybe a use of unrealistic muscle shapes and abnormality in the symmetry of certain limbs such as the arms. Maybe one arm is more monstrous than the other?
My favourite so far of my cute monster sidekick is definitely the bottom middle character. It may need a bit more rounding off on the tail but these designs are looking promising.