Leon the lion

"Leon the Lion is no coward. This large feline has moved to the mean streets of Las Vegas, and is now the 'mane attraction' as the king of concrete urban jungle. Just listen as his royal roar echoes through the city."

~ Official Rampage: Total Destruction description

Background
Leon is a lion-like monster/mutant. When Leon drank some Scum Soda, he had a violent reaction, turning into a giant lion monster

Abilities
Roar Attack takes less energy to perform.