Ku He's original name was Zhan Mingyue.
Ku He was described as one of the Four Great Grandmasters in " Celebrating Years ". He was not weak, and he had displayed great reflexes and recovery abilities in the battle of Dong Mountain. His overall strength was slightly outstanding among the four grandmasters. However, Ku He's weakness was his age. He was the oldest of the four great grandmasters, and aging was inevitable. Thus, in the Eastern Mountain Council, Ku He's strength and age were both past their peak, so he was relatively weak. Although Ku He was Northern Qi's guardian, he was schemed against by the Qing Emperor and eventually died. In summary, Ku He's strength was not the strongest among the Four Great Grandmasters.
Ku He had two disciples. One was Haitang Duoduo, and the other was Lang Tiao.