Zeno Zoldyck

Zeno Zoldyck is the patriarch of the Zoldyck family and Killua's grandfather. Despite his age, he retains immense combat speed and a sharp intellect. He maintains a professional connection with Chairman Netero, which was evident during the mission to infiltrate the Chimera Ant palace. While he holds a particular fondness for his heir, Killua, his primary strength is his seasoned mastery of battle and strategic brilliance.