He is an average man who is nearly bald.
He was one of Gyro's men until being made into a pet by Yunju.
Chimera Ant arcEdit
After Yunju's team attack the hidden drug factory of NGL, he and Spot were made human-dogs by the Chimera Ant. When Kite, Gon and Killua arrive at the factory, Spot begged for help. Yunju intervened by killing Spot and then decides to kill Rover as well. Not wanting to be killed, Rover begged like a dog, but doing so only made Yunju want to kill him even more. Before dying, Rover screamed for help to Kite and company.