Leopard is a descendant of Doronjo, who led a group of thieves called Doronbow. After coming to hold a grudge against Yatterman, she calls herself Doronjo and forms a new Doronbow, together with the descendants of Doronjo's underlings.

Doronbow finally reaches Yatter Metropolis. When they see people being forced to work for Yatterman, Doronjo renews her vow to bring down Yatterman and they sneak into Yatterman's palace, where they're met by the Twelve Yatter Guardian Gods.

After being attacked and falling into a lake, Doronjo and the gang manage to survive. Doronjo comes to realize that in order to change the world, people need to be told the truth about Yatterman; however, no one believes what Doronbow has to say.