Portrait of a man, er, Crocodile: Gustav Leatherback. 40 years old, from Australia. Expert in Full-Contact Karate. Ex-Criminal, and former bodyguard for Shenlong Zhang. After Kentaro defeated him during Zhang's tournament, Gustav returned to Australia, had a bit of a wilderness sabbatical, and decided to change his ways.

He approached Ted Barker, and asked for a position in the UFFC. Due to his record, Barker was unable to put him on the roster, but gave him an important job nevertheless. Ever since Brittney Barker was allowed to compete in the UFFC, her father was wondering how to get her ready.

Due to his injuries, he couldn't train her himself, so he gave Gustav the important job of training Brittney. Because his style includes a few boxing moves, Gustav finds it easy to train Brittney, and has decided that since he can't get another shot at becoming champion, he'll just have to help his student reach for the top.