Ripper Hopper, AKA Jack the Ripper, is a insane Frankenstein, and one of the Eight Specialized types of Dr. Richter Senior.
The Second in the line of eight, Jacks specialization lies in his lungs, from which he can release super compressed air. This allows to to release tearing blasts of air to rip a person apart, or to fire off blasts of air to fly in bursts. "Ripping and Hopping like his name suggests".
Jack is deranged, obsessed with killing and tearing people apart, especially women.
"Ripper Hopper? Who's that?! I'm Jack the Ripper!"
"Nobody stop me!!!"