The Harridan-class Heavy Cruiser is the standard class of Heavy Cruisers in the UGI. They replaced the Harita-class only two years after the Harita-class came out but there are still in use but they are ancient. The Harridan-class is extremely hard to kill and the Battleship was built to take down the Harridan-class but only 3 Heavy cruisers can kill a Battleship and it takes a battleship on average 1.2 hours to take down a Harridan.
The Harridan looks exactly like the Harita just with more advanced features such as Enhanced Shielding, with Photon Accelerator Engines, but more importantly thicker standard armor. The weaponry on this ship is also been updated with more and more powerful cannons, in fact its said that a Cannon on the Harridans can pierce the armor on an Extant though this was never successfully tested.
The aging Harita class needed revamping but instead the Harridan came in and was built off of the Harita, but with a new superstructure system implaced in it allowed the Harridan to take more then twice the beating of an Harita. This class during the Sorghelli War was crucial to the UGI's victory even though all of them were destroyed and the UGI was left with nearly nothing to defend its worlds.