I think Rodan is sorely under-used in Godzilla movies. Rodan was born in a volcano, and I think Rodan should be depicted as red-hot in the movies. He sets fire to things if he lands on them, and can burn Godzilla or other monsters if he gets close to them. Rodan also has that hypersonic flying ability that should be able to shatter building and knock monsters over. I also think Rodan should be depicted as an eagle or hawk, in terms of his ability to attack with his claws and batter a monster about the head with his powerful wings.
Rodan is usually depicted as too wussy in Godzilla films, and I think that needs to change right now.