Nick the demon

"What one word would Paris Hilton use to describe Nick the Demon? Hot. This flamer has brought to New York death and destruction. His other–worldly body is completely fire resistant, giving new meaning to the term 'en fuego'."

- Rampage: Total Destruction

Background
Look at Nick. Nick drank some Scum Soda and had a violent reaction, turning into a giant, flaming, demonic monster.

Abilities
As stated on the official Rampage: Total Destruction website, he is immune to fire. Which - in turn - recovers some health and gives a 500 point bonus.

Ironically, he is not immune to peppers